PART 355—EMERGENCY PLANNING AND NOTIFICATION Authority: Sections 302, 303, 304, 325, 327, 328, and 329 of the Emergency Planning and Community Right-to-Know Act of 1986 (EPCRA) (42 U.S.C. 11002, 11003, 11004, 11045, 11047, 11048, and 11049). Source: 73 FR 65462, Nov. 3, 2008, unless otherwise noted. Subpart A—General Information § 355.1 What is the purpose of this part? (a) This part (40 CFR part 355) establishes requirements for a facility to provide information necessary for developing and implementing State and local chemical emergency response plans, and requirements for emergency notification of chemical releases. This part also lists Extremely Hazardous Substances (EHSs) and Threshold Planning Quantities (TPQs) in Appendices A and B, which are used in determining if you are subject to these requirements. (b) This part is written in a special format to make it easier to understand the regulatory requirements. Like other Environmental Protection Agency (EPA) regulations, this part establishes enforceable legal requirements. Information considered non-binding guidance under EPCRA is indicated in this regulation by the word “note” and a smaller typeface. Such notes are provided for information purposes only and are not considered legally binding under this part. § 355.2 Who do “you,” “I,” and “your” refer to in this part? Throughout this part, “you,” “I,” and “your” refer to the owner or operator of a facility. § 355.3 Which section contains the definitions of the key words used in this part? The definitions of key words used in this part are in § 355.61. It is important to read the definitions for these key words because the definition explains the word's specific meaning associated with the regulations in this part. Subpart B—Emergency Planning Who Must Comply § 355.10 Must my facility comply with the emergency planning requirements of this subpart? You must comply with the emergency planning requirements in this subpart if your facility meets either of the following two conditions: (a) Any extremely hazardous substance (EHS) is present at your facility in an amount equal to or greater than its threshold planning quantity (TPQ), or (b) Your facility has been designated for emergency planning purposes, after public notice and opportunity for comment, by one of the following three entities: (1) The State Emergency Response Commission (SERC). (2) The Governor of the State in which your facility is located. (3) The Chief Executive Officer of the Tribe for the Indian Tribe under whose jurisdiction your facility is located. § 355.11 To what substances do the emergency planning requirements of this subpart apply? The emergency planning requirements of this subpart apply to any EHS listed in Appendices A and B of this part. Additionally, if a facility is designated for emergency planning purposes, as provided in § 355.10(b), substances that are not EHSs at this facility may become subject to the emergency planning requirements. § 355.12 What quantities of extremely hazardous substances trigger emergency planning requirements? Any EHS present at your facility in an amount equal to or greater than its TPQ triggers the emergency planning requirements of this subpart. The TPQs are listed in Appendices A and B of this part in the column labeled “threshold planning quantity.” § 355.13 How do I calculate the quantity of an extremely hazardous substance present in mixtures? If an EHS is present in a mixture in a particular container, determine the quantity (in pounds) of the EHS in that container by multiplying the concentration of the EHS (in weight percent) by the weight (in pounds) of the mixture in the container. If the concentration of an EHS is less than or equal to one percent in the mixture, you do not have to count that EHS. Here is an example calculation: Example: You have 150 pounds of a mixture that contains 20 weight percent of a certain EHS. The quantity of EHS present in the mixture is: EHS (in pounds) = (weight percent of EHS) × (weight of mixture) = (20 percent) × (150 pound mixture) = (0.20) × (150) EHS (in pounds) = 30 pounds § 355.14 Do I have to aggregate extremely hazardous substances to determine the total quantity present? You must aggregate ( i.e. § 355.15 Which threshold planning quantity do I use for an extremely hazardous substance present at my facility in solid form? EHSs that are in solid form are subject to one of two different TPQs (for example, TPQs may be listed as 500/10,000 pounds), both of which are listed in Appendices A and B of this part. Here is how to determine which of the two listed TPQs you must use for an EHS present at your facility in solid form: (a) Use the lower TPQ from Appendices A and B of this part if the solid: (1) Is in powdered form and has a particle size less than 100 microns; (2) Is in solution; (3) Is in molten form; or (4) Meets the criteria for a National Fire Protection Association (NFPA) rating of 2, 3 or 4 for reactivity. Note to paragraph ( a Use the instructions in § 355.16 to calculate the quantity present for the categories of solids listed in paragraphs (a)(1), (2) and (3) of this section. (b) If the solid does not meet one of the criteria in paragraph (a) of this section, then the TPQ is 10,000 pounds. § 355.16 How do I determine the quantity of extremely hazardous substances present for certain forms of solids? For the three forms of solids that are listed in § 355.15(a)(1) through (3), use these instructions to determine the quantity of extremely hazardous substance present: (a) Solid in powdered form with a particle size less than 100 microns. (b) Solid in solution. Note to paragraph ( b This reduction in quantity must not be used to determine the amount present at one-time at a facility for reporting under 40 CFR 370.10. (c) Solid in molten form. Note to paragraph ( c This reduction in quantity must not be used to determine the amount present at one-time at a facility for reporting under 40 CFR 370.10. [73 FR 65462, Nov. 3, 2008, as amended at 77 FR 16688, Mar. 22, 2012] How to Comply § 355.20 If this subpart applies to my facility, what information must I provide, who must I submit it to, and when is it due? Use this table to determine the information you must provide, who to provide it to, and when: What types of emergency planning notification are required? What information must I provide? To whom must I provide the When must I provide the information? (a) Emergency planning notification You must provide notice that your facility is subject to the emergency planning requirements of this subpart To the SERC and the LEPC Within 60 days after your facility first becomes subject to the requirements of this subpart. If no LEPC exists for your facility at the time you are required to provide emergency planning notification, then you should report to the LEPC within 30 days after an LEPC is established for the emergency planning district in which your facility is located. (b) Facility emergency coordinator You must designate a facility representative who will participate in the local emergency planning process as a facility emergency response coordinator. You must provide notice of this facility representative To the LEPC (or the SERC if there is no LEPC, or the Governor if there is no SERC) Within 60 days after your facility first becomes subject to the requirements of this subpart. If no LEPC exists when you first report, then provide an additional report to the LEPC within 30 days after such LEPC is established for the emergency planning district in which your facility is located. (c) Changes relevant to emergency planning You must provide notice of any changes occurring at your facility that may be relevant to emergency planning To the LEPC Within 30 days after the changes have occurred. (d) Requested information You must provide any information necessary for developing or implementing the local emergency plan if the LEPC requests it To the LEPC Promptly. Note: The LEPC may specify a time frame for this information. § 355.21 In what format should the information be submitted? EPA does not require any specific format. EPA recommends that you submit the information described in § 355.20 in writing in order to insure appropriate documentation. The SERC or LEPC may request that this information be submitted in a specific format. Subpart C—Emergency Release Notification Who Must Comply § 355.30 What facilities must comply with the emergency release notification requirements of this subpart? You must comply with the emergency release notification requirements in this subpart if both of these two conditions are met: (a) You produce, use, or store a hazardous chemical at your facility; and (b) You release a reportable quantity (RQ) of any EHS or of a hazardous substance as defined by the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA Hazardous Substance) at your facility. Certain releases are exempted from these requirements. Exempted releases are listed in § 355.31. Note to paragraph ( b In addition to the emergency release notification requirements of this subpart, releases of CERCLA hazardous substances are subject to the notification requirements under CERCLA. This is explained further in subpart D of this part. § 355.31 What types of releases are exempt from the emergency release notification requirements of this subpart? You do not have to provide emergency release notification under this subpart for any of the following six types of releases of EHSs or CERCLA hazardous substances that occur at your facility: (a) Any release that results in exposure to persons solely within the boundaries of your facility. (b) Any release that is a federally permitted release as defined in section 101(10) of CERCLA. (c) Any release of a pesticide product that is exempt from reporting under section 103(e) of CERCLA. (d) Any release that does not meet the definition of release under section 101(22) of CERCLA and is therefore exempt from CERCLA section 103(a) reporting. (e) Any radionuclide release that occurs: (1) Naturally in soil from land holdings such as parks, golf courses, or other large tracts of land. (2) Naturally from land disturbance activities, including farming, construction, and land disturbance incidental to extraction during mining activities, except that which occurs at uranium, phosphate, tin, zircon, hafnium, vanadium, monazite, and rare earth mines. Land disturbance incidental to extraction includes: Land clearing; overburden removal and stockpiling; excavating, handling, transporting, and storing ores and other raw (not beneficiated or processed) materials; and replacing in mined-out areas coal ash, earthen materials from farming or construction, or overburden or other raw materials generated from the exempted mining activities. (3) From the dumping and transportation of coal and coal ash (including fly ash, bottom ash, and boiler slags), including the dumping and land spreading operations that occur during coal ash uses. (4) From piles of coal and coal ash, including fly ash, bottom ash, and boiler slags. (f) Any release less than 1,000 pounds per 24 hours of nitrogen oxide or nitrogen dioxide to the air which is the result of combustion and combustion related activities. (g) Air emissions from animal waste (including decomposing animal waste) at a farm. [73 FR 65462, Nov. 3, 2008, as amended at 73 FR 76960, Dec. 18, 2008; 83 FR 37446, Aug. 1, 2018; 84 FR 27452, June 13, 2019] § 355.32 Which emergency release notification requirements apply to continuous releases? If the release of an EHS or CERCLA hazardous substance is continuous and stable in quantity and rate at your facility as defined in 40 CFR 302.8(b), then the release qualifies for reduced reporting requirements under this subpart. Under these reduced reporting requirements, you do not need to provide the notifications required under § 355.40. However, in addition to the notifications required under 40 CFR 302.8, you must make all of the following notifications to the community emergency coordinator for the LEPC for any area likely to be affected by the release and to the SERC of any State likely to be affected by the release: (a) Initial notifications as specified in 40 CFR 302.8 (d) and (e). (b) Notification of a “statistically significant increase,” defined in 40 CFR 302.8(b) as any increase above the upper bound of the reported normal range. (c) Notification of a “new release” as specified in 40 CFR 302.8(g)(1). (d) Notification of a change in the normal range of the release as specified under 40 CFR 302.8(g)(2). § 355.33 What release quantities of EHSs and CERCLA hazardous substances trigger the emergency release notification requirements of this subpart? The release of a reportable quantity (RQ) of an EHS or CERCLA hazardous substance within any 24-hour period triggers the emergency release notification requirements. RQs for EHSs are listed in Appendices A and B of this part in the column labeled “reportable quantity.” RQs for CERCLA hazardous substances are listed in Table 302.4 of 40 CFR 302.4 in the column labeled “final RQ.” How To Comply § 355.40 What information must I provide? You must make two separate notifications to comply with the emergency release notification requirements of this subpart: an immediate notification, and as soon as practicable thereafter a written follow-up emergency notification (or notifications, as more information becomes available). (a) Immediate notification. (1) The chemical name or identity of any substance involved in the release. (2) Indicate whether the substance is an EHS. (3) Provide an estimate of the quantity of any such substance that was released into the environment. (4) State the time and duration of the release. (5) The medium or media into which the release occurred. (6) Any known or anticipated acute or chronic health risks associated with the emergency and, where appropriate, advice regarding medical attention necessary for exposed individuals. (7) Proper precautions to take as a result of the release, including evacuation (unless such information is readily available to the community emergency coordinator pursuant to the emergency plan). (8) The name and telephone number of the individual (or individuals) to be contacted for further information. (b) Written follow-up emergency notification. (1) Actions taken to respond and contain the release. (2) Any known or anticipated acute or chronic health risks associated with the release. (3) Where appropriate, advice regarding medical attention necessary for exposed individuals. (c) You are not required to submit a written follow-up notification for a release that occurred during transportation or from storage incident to transportation. See § 355.42(b) for requirements for reporting such releases. § 355.41 In what format should the information be submitted? The immediate notification, described in § 355.40(a), should be oral. The follow-up emergency notification, described in § 355.40(b), shall be in writing. EPA does not specify a particular format for the written follow-up emergency notification. Note 1 to § 355.41: The SERC and LEPC may request a specific format for this information. [73 FR 65462, Nov. 3, 2008, as amended at 85 FR 44772, July 24, 2020] § 355.42 To whom must I submit the information? (a) You must provide the immediate emergency release notification information and the written follow-up notification to: (1) The community emergency coordinator for the LEPC of any area likely to be affected by the release (if there is no LEPC, notify the relevant local emergency response personnel); and (2) The SERC of any State likely to be affected by the release. (b) For a release that occurs during transportation or from storage incident to transportation, you may meet the requirements of this subpart by notifying the 911 operator (or in the absence of a 911 emergency telephone number, the operator) of the immediate notification information listed in § 355.40(a). You are not required under this subpart to submit a written follow-up notification, as described in § 355.40(b), for such a release. § 355.43 When must I submit the information? (a) You must provide the required emergency release notification information described under § 355.40(a), immediately. (b) You must provide the written follow-up emergency notice (or notices, as more information becomes available) described under § 355.40(b), as soon as practicable after the release. Subpart D—Additional Provisions § 355.60 What is the relationship between the emergency release notification requirements of this part and the release notification requirements of CERCLA? The emergency release notification requirements of this part are in addition to the release notification requirements of CERCLA. If you have a release of a CERCLA hazardous substance, you must comply with the emergency release notification requirements of this part and the release notification requirements of CERCLA section 103, codified at 40 CFR part 302. Use this table to determine which emergency release notification requirements apply to your release: If a reportable quantity of a substance is released within a 24-hour period at your facility And if the release is reportable under EPCRA Section 304, you must And if the release is reportable under CERCLA Section 103, you must (a) And the substance is on BOTH the list of EHSs (Appendices A and B of this part) AND the list of CERCLA Hazardous Substances (40 CFR 302.4) Notify the LEPC and the SERC in accordance with §§ 355.40 through 355.43 of this part (except for a release during transportation or from storage incident to transportation; see § 355.42(b)) Comply with the release notification requirements of CERCLA section 103 and its implementing regulations (40 CFR part 302). Call the NRC at 800-424-8802. (b) And the substance is on the list of CERCLA Hazardous Substances (40 CFR 302.4) and not on the list of EHSs (Appendices A and B of this part) Notify the LEPC and the SERC, in accordance with §§ 355.40 through 355.43 of this part (except for a release during transportation or from storage incident to transportation; see in § 355.42(b)) Comply with the release notification requirements of CERCLA section 103 and its implementing regulations (40 CFR part 302). Call the NRC at 800-424-8802. (c) And the substance is on the list of EHSs (Appendices A and B of this part) and not the list of CERCLA Hazardous Substances (40 CFR 302.4) Notify the LEPC and the SERC in accordance with §§ 355.40 through 355.43 of this part (except for a release during transportation or from storage incident to transportation; see § 355.42(b)) Note: § 355.61 How are key words in this part defined? Animal waste CERCLA CERCLA hazardous substance Chief Executive Officer of the Tribe Environment EPCRA Extremely hazardous substance (EHS) Facility Facility Farm (1) Is used for— (i) The production of a crop; or (ii) The raising or selling of animals (including any form of livestock, poultry, or fish); and (2) Under normal conditions, produces during a farm year any agricultural products with a total value equal to not less than $1,000. Hazardous chemical (1) Any food, food additive, color additive, drug, or cosmetic regulated by the Food and Drug Administration. (2) Any substance present as a solid in any manufactured item to the extent exposure to the substance does not occur under normal conditions of use. (3) Any substance to the extent it is used: (i) For personal, family, or household purposes, or is present in the same form and concentration as a product packaged for distribution and use by the general public. Present in the same form and concentration as a product packaged for distribution and use by the general public means a substance packaged in a similar manner and present in the same concentration as the substance when packaged for use by the general public, whether or not it is intended for distribution to the general public or used for the same purpose as when it is packaged for use by the general public; (ii) In a research laboratory or hospital or other medical facility under the direct supervision of a technically qualified individual; or (iii) In routine agricultural operations or is a fertilizer held for sale by a retailer to the ultimate customer. Indian Country (1) All land within the limits of any Indian reservation under the jurisdiction of the United States government, notwithstanding the issuance of any patent, and, including rights-of-way running through the reservation; (2) All dependent Indian communities within the borders of the United States whether within the original or subsequently acquired territory thereof, and whether within or without the limits of a State; and (3) All Indian allotments, the Indian titles to which have not been extinguished, including rights-of-way running through the same. Indian Tribe or Tribe LEPC Medium or media i.e. Mixture Non-reactive solid Person Reactive solid Release Reportable quantity SERC Solution State Threshold planning quantity [73 FR 65462, Nov. 3, 2008, as amended at 73 FR 76960, Dec. 18, 2008; 77 FR 16688, Mar. 22, 2012; 83 FR 37466, Aug. 1, 2018; 84 FR 27542, June 13, 2019] Appendix A to Part 355—The List of Extremely Hazardous Substances and Their Threshold Planning Quantities [Alphabetical Order] CAS No. Chemical name Notes Reportable quantity * Threshold planning quantity 75-86-5 Acetone Cyanohydrin 10 1,000 1752-30-3 Acetone Thiosemicarbazide 1,000 1,000/10,000 107-02-8 Acrolein 1 500 79-06-1 Acrylamide f 5,000 1,000/10,000 107-13-1 Acrylonitrile f 100 10,000 814-68-6 Acrylyl Chloride d 100 100 111-69-3 Adiponitrile f 1,000 1,000 116-06-3 Aldicarb b 1 100/10,000 309-00-2 Aldrin 1 500/10,000 107-18-6 Allyl Alcohol 100 1,000 107-11-9 Allylamine 500 500 20859-73-8 Aluminum Phosphide a 100 500 54-62-6 Aminopterin 500 500/10,000 78-53-5 Amiton 500 500 3734-97-2 Amiton Oxalate 100 100/10,000 7664-41-7 Ammonia f 100 500 300-62-9 Amphetamine 1,000 1,000 62-53-3 Aniline f 5,000 1,000 88-05-1 Aniline, 2,4,6-Trimethyl- 500 500 7783-70-2 Antimony Pentafluoride 500 500 1397-94-0 Antimycin A b 1,000 1,000/10,000 86-88-4 ANTU 100 500/10,000 1303-28-2 Arsenic Pentoxide 1 100/10,000 1327-53-3 Arsenous Oxide d 1 100/10,000 7784-34-1 Arsenous Trichloride 1 500 7784-42-1 Arsine 100 100 2642-71-9 Azinphos-Ethyl 100 100/10,000 86-50-0 Azinphos-Methyl 1 10/10,000 98-87-3 Benzal Chloride 5,000 500 98-16-8 Benzenamine, 3-(Trifluoromethyl)- 500 500 100-14-1 Benzene, 1-(Chloromethyl)-4-Nitro- 500 500/10,000 98-05-5 Benzenearsonic Acid 10 10/10,000 3615-21-2 Benzimidazole, 4,5-Dichloro-2-(Trifluoromethyl)- c 500 500/10,000 98-07-7 Benzotrichloride 10 100 100-44-7 Benzyl Chloride 100 500 140-29-4 Benzyl Cyanide d 500 500 15271-41-7 Bicyclo[2.2.1]Heptane-2-Carbonitrile, 5-Chloro-6-((((Methylamino)Carbonyl)Oxy)Imino)-, (1s-(1-alpha,2-beta,4-alpha,5-alpha,6E))- 500 500/10,000 534-07-6 Bis(Chloromethyl) Ketone 10 10/10,000 4044-65-9 Bitoscanate 500 500/10,000 10294-34-5 Boron Trichloride 500 500 7637-07-2 Boron Trifluoride 500 500 353-42-4 Boron Trifluoride Compound With Methyl Ether (1:1) 1,000 1,000 28772-56-7 Bromadiolone 100 100/10,000 7726-95-6 Bromine f 500 500 1306-19-0 Cadmium Oxide 100 100/10,000 2223-93-0 Cadmium Stearate b 1,000 1,000/10,000 7778-44-1 Calcium Arsenate 1 500/10,000 8001-35-2 Camphechlor 1 500/10,000 56-25-7 Cantharidin 100 100/10,000 51-83-2 Carbachol Chloride 500 500/10,000 26419-73-8 Carbamic Acid, Methyl-, O-(((2,4-Dimethyl-1, 3-Dithiolan-2-yl)Methylene)Amino)- 100 100/10,000 1563-66-2 Carbofuran 10 10/10,000 75-15-0 Carbon Disulfide f 100 10,000 786-19-6 Carbophenothion 500 500 57-74-9 Chlordane 1 1,000 470-90-6 Chlorfenvinfos 500 500 7782-50-5 Chlorine 10 100 24934-91-6 Chlormephos 500 500 999-81-5 Chlormequat Chloride d 100 100/10,000 79-11-8 Chloroacetic Acid 100 100/10,000 107-07-3 Chloroethanol 500 500 627-11-2 Chloroethyl Chloroformate 1,000 1,000 67-66-3 Chloroform f 10 10,000 542-88-1 Chloromethyl Ether d 10 100 107-30-2 Chloromethyl Methyl Ether b 10 100 3691-35-8 Chlorophacinone 100 100/10,000 1982-47-4 Chloroxuron 500 500/10,000 21923-23-9 Chlorthiophos d 500 500 10025-73-7 Chromic Chloride 1 1/10,000 62207-76-5 Cobalt, ((2,2′-(1,2-Ethanediylbis (Nitrilomethylidyne)) Bis(6-Fluorophenolato))(2-)-N,N′,O,O′)- 100 100/10,000 10210-68-1 Cobalt Carbonyl d 10 10/10,000 64-86-8 Colchicine d 10 10/10,000 56-72-4 Coumaphos 10 100/10,000 5836-29-3 Coumatetralyl 500 500/10,000 95-48-7 Cresol, o- 100 1,000/10,000 535-89-7 Crimidine 100 100/10,000 4170-30-3 Crotonaldehyde 100 1,000 123-73-9 Crotonaldehyde, (E)- 100 1,000 506-68-3 Cyanogen Bromide 1,000 500/10,000 506-78-5 Cyanogen Iodide 1,000 1,000/10,000 2636-26-2 Cyanophos 1,000 1,000 675-14-9 Cyanuric Fluoride 100 100 66-81-9 Cycloheximide 100 100/10,000 108-91-8 Cyclohexylamine f 10,000 10,000 17702-41-9 Decaborane(14) 500 500/10,000 8065-48-3 Demeton 500 500 919-86-8 Demeton-S-Methyl 500 500 10311-84-9 Dialifor 100 100/10,000 19287-45-7 Diborane 100 100 111-44-4 Dichloroethyl ether 10 10,000 149-74-6 Dichloromethylphenylsilane 1,000 1,000 62-73-7 Dichlorvos 10 1,000 141-66-2 Dicrotophos 100 100 1464-53-5 Diepoxybutane 10 500 814-49-3 Diethyl Chlorophosphate d 500 500 71-63-6 Digitoxin b 100 100/10,000 2238-07-5 Diglycidyl Ether 1,000 1,000 20830-75-5 Digoxin d 10 10/10,000 115-26-4 Dimefox 500 500 60-51-5 Dimethoate 10 500/10,000 2524-03-0 Dimethyl Phosphorochloridothioate 500 500 77-78-1 Dimethyl sulfate 100 500 75-78-5 Dimethyldichlorosilane d 500 500 57-14-7 Dimethylhydrazine 10 1,000 99-98-9 Dimethyl-p-Phenylenediamine 10 10/10,000 644-64-4 Dimetilan 1 500/10,000 534-52-1 Dinitrocresol 10 10/10,000 88-85-7 Dinoseb 1,000 100/10,000 1420-07-1 Dinoterb 500 500/10,000 78-34-2 Dioxathion 500 500 82-66-6 Diphacinone 10 10/10,000 152-16-9 Diphosphoramide, Octamethyl- 100 100 298-04-4 Disulfoton 1 500 514-73-8 Dithiazanine Iodide 500 500/10,000 541-53-7 Dithiobiuret 100 100/10,000 316-42-7 Emetine, Dihydrochloride d 1 1/10,000 115-29-7 Endosulfan 1 10/10,000 2778-04-3 Endothion 500 500/10,000 72-20-8 Endrin 1 500/10,000 106-89-8 Epichlorohydrin f 100 1,000 2104-64-5 EPN 100 100/10,000 50-14-6 Ergocalciferol b 1,000 1,000/10,000 379-79-3 Ergotamine Tartrate 500 500/10,000 1622-32-8 Ethanesulfonyl Chloride, 2-Chloro- 500 500 10140-87-1 Ethanol, 1,2-Dichloro-, Acetate 1,000 1,000 563-12-2 Ethion 10 1,000 13194-48-4 Ethoprophos 1,000 1,000 538-07-8 Ethylbis(2-Chloroethyl)Amine d 500 500 371-62-0 Ethylene Fluorohydrin b, d 10 10 75-21-8 Ethylene Oxide f 10 1,000 107-15-3 Ethylenediamine 5,000 10,000 151-56-4 Ethyleneimine 1 500 542-90-5 Ethylthiocyanate 10,000 10,000 22224-92-6 Fenamiphos 10 10/10,000 115-90-2 Fensulfothion d 500 500 4301-50-2 Fluenetil 100 100/10,000 7782-41-4 Fluorine e 10 500 640-19-7 Fluoroacetamide 100 100/10,000 144-49-0 Fluoroacetic Acid 10 10/10,000 359-06-8 Fluoroacetyl Chloride b 10 10 51-21-8 Fluorouracil 500 500/10,000 944-22-9 Fonofos 500 500 50-00-0 Formaldehyde f 100 500 107-16-4 Formaldehyde Cyanohydrin d 1,000 1,000 23422-53-9 Formetanate Hydrochloride d 100 500/10,000 2540-82-1 Formothion 100 100 17702-57-7 Formparanate 100 100/10,000 21548-32-3 Fosthietan 500 500 3878-19-1 Fuberidazole 100 100/10,000 110-00-9 Furan 100 500 13450-90-3 Gallium Trichloride 500 500/10,000 77-47-4 Hexachlorocyclopentadiene d 10 100 4835-11-4 Hexamethylenediamine, N,N′-Dibutyl- 500 500 302-01-2 Hydrazine 1 1,000 74-90-8 Hydrocyanic Acid 10 100 7647-01-0 Hydrogen Chloride (gas only) f 5,000 500 7664-39-3 Hydrogen Fluoride 100 100 7722-84-1 Hydrogen Peroxide (Conc >52%) f 1,000 1,000 7783-07-5 Hydrogen Selenide 10 10 7783-06-4 Hydrogen Sulfide f 100 500 123-31-9 Hydroquinone f 100 500/10,000 13463-40-6 Iron, Pentacarbonyl- 100 100 297-78-9 Isobenzan 100 100/10,000 78-82-0 Isobutyronitrile d 1,000 1,000 102-36-3 Isocyanic Acid, 3,4-Dichlorophenyl Ester 500 500/10,000 465-73-6 Isodrin 1 100/10,000 55-91-4 Isofluorphate b 100 100 4098-71-9 Isophorone Diisocyanate g 500 500 108-23-6 Isopropyl Chloroformate 1,000 1,000 119-38-0 Isopropylmethyl-pyrazolyl Dimethylcarbamate 100 500 78-97-7 Lactonitrile 1,000 1,000 21609-90-5 Leptophos 500 500/10,000 541-25-3 Lewisite b, d 10 10 58-89-9 Lindane 1 1,000/10,000 7580-67-8 Lithium Hydride a 100 100 109-77-3 Malononitrile 1,000 500/10,000 12108-13-3 Manganese, Tricarbonyl Methylcyclopentadienyl d 100 100 51-75-2 Mechlorethamine b 10 10 950-10-7 Mephosfolan 500 500 1600-27-7 Mercuric Acetate 500 500/10,000 7487-94-7 Mercuric Chloride 500 500/10,000 21908-53-2 Mercuric Oxide 500 500/10,000 10476-95-6 Methacrolein Diacetate 1,000 1,000 760-93-0 Methacrylic Anhydride 500 500 126-98-7 Methacrylonitrile d 1,000 500 920-46-7 Methacryloyl Chloride 100 100 30674-80-7 Methacryloyloxyethyl Isocyanate d 100 100 10265-92-6 Methamidophos 100 100/10,000 558-25-8 Methanesulfonyl Fluoride 1,000 1,000 950-37-8 Methidathion 500 500/10,000 2032-65-7 Methiocarb 10 500/10,000 16752-77-5 Methomyl d 100 500/10,000 151-38-2 Methoxyethylmercuric Acetate 500 500/10,000 80-63-7 Methyl 2-Chloroacrylate 500 500 74-83-9 Methyl Bromide f 1,000 1,000 79-22-1 Methyl Chloroformate d 1,000 500 60-34-4 Methyl Hydrazine 10 500 624-83-9 Methyl Isocyanate 10 500 556-61-6 Methyl Isothiocyanate a 500 500 74-93-1 Methyl Mercaptan f 100 500 3735-23-7 Methyl Phenkapton 500 500 676-97-1 Methyl Phosphonic Dichloride a 100 100 556-64-9 Methyl Thiocyanate 10,000 10,000 78-94-4 Methyl Vinyl Ketone 10 10 502-39-6 Methylmercuric Dicyanamide 500 500/10,000 75-79-6 Methyltrichlorosilane d 500 500 1129-41-5 Metolcarb 1,000 100/10,000 7786-34-7 Mevinphos 10 500 315-18-4 Mexacarbate d 1,000 500/10,000 50-07-7 Mitomycin C 10 500/10,000 6923-22-4 Monocrotophos 10 10/10,000 2763-96-4 Muscimol 1,000 500/10,000 505-60-2 Mustard Gas d 500 500 13463-39-3 Nickel Carbonyl 10 1 54-11-5 Nicotine b 100 100 65-30-5 Nicotine Sulfate 100 100/10,000 7697-37-2 Nitric Acid 1,000 1,000 10102-43-9 Nitric Oxide b 10 100 98-95-3 Nitrobenzene f 1,000 10,000 1122-60-7 Nitrocyclohexane 500 500 10102-44-0 Nitrogen Dioxide 10 100 62-75-9 Nitrosodimethylamine d 10 1,000 991-42-4 Norbormide 100 100/10,000 Organorhodium Complex (PMN-82-147) 10 10/10,000 630-60-4 Ouabain b 100 100/10,000 23135-22-0 Oxamyl 100 100/10,000 78-71-7 Oxetane, 3,3-Bis(Chloromethyl)- 500 500 2497-07-6 Oxydisulfoton d 500 500 10028-15-6 Ozone 100 100 1910-42-5 Paraquat Dichloride 10 10/10,000 2074-50-2 Paraquat Methosulfate 10 10/10,000 56-38-2 Parathion b 10 100 298-00-0 Parathion-Methyl b 100 100/10,000 12002-03-8 Paris Green 1 500/10,000 19624-22-7 Pentaborane 500 500 2570-26-5 Pentadecylamine 100 100/10,000 79-21-0 Peracetic Acid 500 500 594-42-3 Perchloromethylmercaptan 100 500 108-95-2 Phenol 1,000 500/10,000 4418-66-0 Phenol, 2,2′-Thiobis(4-Chloro-6-Methyl)- 100 100/10,000 64-00-6 Phenol, 3-(1-Methylethyl)-, Methylcarbamate 10 500/10,000 58-36-6 Phenoxarsine, 10,10′-Oxydi- 500 500/10,000 696-28-6 Phenyl Dichloroarsine d 1 500 59-88-1 Phenylhydrazine Hydrochloride 1,000 1,000/10,000 62-38-4 Phenylmercury Acetate 100 500/10,000 2097-19-0 Phenylsilatrane d 100 100/10,000 103-85-5 Phenylthiourea 100 100/10,000 298-02-2 Phorate 10 10 4104-14-7 Phosacetim 100 100/10,000 947-02-4 Phosfolan 100 100/10,000 75-44-5 Phosgene f 10 10 13171-21-6 Phosphamidon 100 100 7803-51-2 Phosphine 100 500 2703-13-1 Phosphonothioic Acid, Methyl-, O-Ethyl O-(4-(Methylthio) Phenyl) Ester 500 500 50782-69-9 Phosphonothioic Acid, Methyl-, S-(2-(Bis(1Methylethyl)Amino)Ethyl) O-Ethyl Ester 100 100 2665-30-7 Phosphonothioic Acid, Methyl-, O-(4-Nitrophenyl) O-Phenyl Ester 500 500 3254-63-5 Phosphoric Acid, Dimethyl 4-(Methylthio)Phenyl Ester 500 500 2587-90-8 Phosphorothioic Acid, O,O-Dimethyl-S-(2-Methylthio) Ethyl Ester b, c 500 500 7723-14-0 Phosphorus a, d 1 100 10025-87-3 Phosphorus Oxychloride 1,000 500 10026-13-8 Phosphorus Pentachloride a 500 500 7719-12-2 Phosphorus Trichloride 1,000 1,000 57-47-6 Physostigmine 100 100/10,000 57-64-7 Physostigmine, Salicylate (1:1) 100 100/10,000 124-87-8 Picrotoxin 500 500/10,000 110-89-4 Piperidine 1,000 1,000 23505-41-1 Pirimifos-Ethyl 1,000 1,000 10124-50-2 Potassium Arsenite 1 500/10,000 151-50-8 Potassium Cyanide a 10 100 506-61-6 Potassium Silver Cyanide a 1 500 2631-37-0 Promecarb d 1,000 500/10,000 106-96-7 Propargyl Bromide 10 10 57-57-8 Propiolactone, Beta- 10 500 107-12-0 Propionitrile 10 500 542-76-7 Propionitrile, 3-Chloro- 1,000 1,000 70-69-9 Propiophenone, 4-Amino- c 100 100/10,000 109-61-5 Propyl Chloroformate 500 500 75-56-9 Propylene Oxide f 100 10,000 75-55-8 Propyleneimine 1 10,000 2275-18-5 Prothoate 100 100/10,000 129-00-0 Pyrene b 5,000 1,000/10,000 140-76-1 Pyridine, 2-Methyl-5-Vinyl- 500 500 504-24-5 Pyridine, 4-Amino- d 1,000 500/10,000 1124-33-0 Pyridine, 4-Nitro-,l-Oxide 500 500/10,000 53558-25-1 Pyriminil d 100 100/10,000 14167-18-1 Salcomine 500 500/10,000 107-44-8 Sarin d 10 10 7783-00-8 Selenious Acid 10 1,000/10,000 7791-23-3 Selenium Oxychloride 500 500 563-41-7 Semicarbazide Hydrochloride 1,000 1,000/10,000 3037-72-7 Silane, (4-Aminobutyl)Diethoxymethyl- 1,000 1,000 7631-89-2 Sodium Arsenate 1 1,000/10,000 7784-46-5 Sodium Arsenite 1 500/10,000 26628-22-8 Sodium Azide (Na(N 3 a 1,000 500 124-65-2 Sodium Cacodylate 100 100/10,000 143-33-9 Sodium Cyanide (Na(CN)) a 10 100 62-74-8 Sodium Fluoroacetate 10 10/10,000 13410-01-0 Sodium Selenate 100 100/10,000 10102-18-8 Sodium Selenite d 100 100/10,000 10102-20-2 Sodium Tellurite 500 500/10,000 900-95-8 Stannane, Acetoxytriphenyl- c 500 500/10,000 57-24-9 Strychnine b 10 100/10,000 60-41-3 Strychnine Sulfate 10 100/10,000 3689-24-5 Sulfotep 100 500 3569-57-1 Sulfoxide, 3-Chloropropyl Octyl 500 500 7446-09-5 Sulfur Dioxide f 500 500 7783-60-0 Sulfur Tetrafluoride 100 100 7446-11-9 Sulfur Trioxide a 100 100 7664-93-9 Sulfuric Acid 1,000 1,000 77-81-6 Tabun b, d 10 10 7783-80-4 Tellurium Hexafluoride e 100 100 107-49-3 TEPP 10 100 13071-79-9 Terbufos d 100 100 78-00-2 Tetraethyllead b 10 100 597-64-8 Tetraethyltin b 100 100 75-74-1 Tetramethyllead b, f 100 100 509-14-8 Tetranitromethane 10 500 10031-59-1 Thallium Sulfate d 100 100/10,000 6533-73-9 Thallous Carbonate b, d 100 100/10,000 7791-12-0 Thallous Chloride b, d 100 100/10,000 2757-18-8 Thallous Malonate b, d 100 100/10,000 7446-18-6 Thallous Sulfate 100 100/10,000 2231-57-4 Thiocarbazide 1,000 1,000/10,000 39196-18-4 Thiofanox 100 100/10,000 297-97-2 Thionazin 100 500 108-98-5 Thiophenol 100 500 79-19-6 Thiosemicarbazide 100 100/10,000 5344-82-1 Thiourea, (2-Chlorophenyl)- 100 100/10,000 614-78-8 Thiourea, (2-Methylphenyl)- 500 500/10,000 7550-45-0 Titanium Tetrachloride 1,000 100 584-84-9 Toluene 2,4-Diisocyanate 100 500 91-08-7 Toluene 2,6-Diisocyanate 100 100 110-57-6 Trans-1,4-Dichlorobutene 500 500 1031-47-6 Triamiphos 500 500/10,000 24017-47-8 Triazofos 500 500 76-02-8 Trichloroacetyl Chloride 500 500 115-21-9 Trichloroethylsilane d 500 500 327-98-0 Trichloronate e 500 500 98-13-5 Trichlorophenylsilane d 500 500 1558-25-4 Trichloro(Chloromethyl)Silane 100 100 27137-85-5 Trichloro(Dichlorophenyl) Silane 500 500 998-30-1 Triethoxysilane 500 500 75-77-4 Trimethylchlorosilane 1,000 1,000 824-11-3 Trimethylolpropane Phosphite d 100 100/10,000 1066-45-1 Trimethyltin Chloride 500 500/10,000 639-58-7 Triphenyltin Chloride 500 500/10,000 555-77-1 Tris(2-Chloroethyl)Amine d 100 100 2001-95-8 Valinomycin b 1,000 1,000/10,000 1314-62-1 Vanadium Pentoxide 1,000 100/10,000 108-05-4 Vinyl Acetate Monomer f 5,000 1,000 81-81-2 Warfarin 100 500/10,000 129-06-6 Warfarin Sodium d 100 100/10,000 28347-13-9 Xylylene Dichloride 100 100/10,000 58270-08-9 Zinc, Dichloro(4,4-Dimethyl-5((((Methylamino)Carbonyl) Oxy)Imino)Pentanenitrile)-, (T-4)- 100 100/10,000 1314-84-7 Zinc Phosphide a 100 500 * Only the statutory or final RQ is shown. For more information, see 40 CFR 355.61. Notes: a. This material is a reactive solid. The TPQ does not default to 10,000 pounds for non-powder, non-molten, non-solution form. b. The calculated TPQ changed after technical review as described in a technical support document for the final rule, April 22, 1987. c. Chemicals added by final rule, April 22, 1987. d. Revised TPQ based on new or re-evaluated toxicity data, April 22, 1987. e. The TPQ was revised due to calculation error, April 22, 1987. f. Chemicals on the original list that do not meet toxicity criteria but because of their acute lethality, high production volume and known risk are considered chemicals of concern (“Other chemicals”), November 17, 1986 and February 15, 1990. g. The TPQ was recalculated (September 8, 2003) since it was mistakenly calculated in the April 22, 1987 final rule under the wrong assumption that this chemical is a reactive solid, when in fact it is a liquid. RQ for this chemical was adjusted on September 11, 2006. Appendix B to Part 355—The List of Extremely Hazardous Substances and Their Threshold Planning Quantities [CAS Number Order] CAS No. Chemical name Notes Reportable quantity * Threshold planning quantity 0 Organorhodium Complex (PMN-82-147) 10 10/10,000 50-00-0 Formaldehyde f 100 500 50-07-7 Mitomycin C 10 500/10,000 50-14-6 Ergocalciferol b 1,000 1,000/10,000 51-21-8 Fluorouracil 500 500/10,000 51-75-2 Mechlorethamine b 10 10 51-83-2 Carbachol Chloride 500 500/10,000 54-11-5 Nicotine b 100 100 54-62-6 Aminopterin 500 500/10,000 55-91-4 Isofluorphate b 100 100 56-25-7 Cantharidin 100 100/10,000 56-38-2 Parathion b 10 100 56-72-4 Coumaphos 10 100/10,000 57-14-7 Dimethylhydrazine 10 1,000 57-24-9 Strychnine b 10 100/10,000 57-47-6 Physostigmine 100 100/10,000 57-57-8 Propiolactone, Beta- 10 500 57-64-7 Physostigmine, Salicylate (1:1) 100 100/10,000 57-74-9 Chlordane 1 1,000 58-36-6 Phenoxarsine, 10,10′-Oxydi- 500 500/10,000 58-89-9 Lindane 1 1,000/10,000 59-88-1 Phenylhydrazine Hydrochloride 1,000 1,000/10,000 60-34-4 Methyl Hydrazine 10 500 60-41-3 Strychnine sulfate 10 100/10,000 60-51-5 Dimethoate 10 500/10,000 62-38-4 Phenylmercury Acetate 100 500/10,000 62-53-3 Aniline f 5,000 1,000 62-73-7 Dichlorvos 10 1,000 62-74-8 Sodium Fluoroacetate 10 10/10,000 62-75-9 Nitrosodimethylamine d 10 1,000 64-00-6 Phenol, 3-(1-Methylethyl)-, Methylcarbamate 10 500/10,000 64-86-8 Colchicine d 10 10/10,000 65-30-5 Nicotine sulfate 100 100/10,000 66-81-9 Cycloheximide 100 100/10,000 67-66-3 Chloroform f 10 10,000 70-69-9 Propiophenone, 4-Amino- c 100 100/10,000 71-63-6 Digitoxin b 100 100/10,000 72-20-8 Endrin 1 500/10,000 74-83-9 Methyl Bromide f 1,000 1,000 74-90-8 Hydrocyanic Acid 10 100 74-93-1 Methyl Mercaptan f 100 500 75-15-0 Carbon Disulfide f 100 10,000 75-21-8 Ethylene Oxide f 10 1,000 75-44-5 Phosgene f 10 10 75-55-8 Propyleneimine 1 10,000 75-56-9 Propylene Oxide f 100 10,000 75-74-1 Tetramethyllead b, f 100 100 75-77-4 Trimethylchlorosilane 1,000 1,000 75-78-5 Dimethyldichlorosilane d 500 500 75-79-6 Methyltrichlorosilane d 500 500 75-86-5 Acetone Cyanohydrin 10 1,000 76-02-8 Trichloroacetyl Chloride 500 500 77-47-4 Hexachlorocyclopentadiene d 10 100 77-78-1 Dimethyl Sulfate 100 500 77-81-6 Tabun b, d 10 10 78-00-2 Tetraethyllead b 10 100 78-34-2 Dioxathion 500 500 78-53-5 Amiton 500 500 78-71-7 Oxetane, 3,3-Bis(Chloromethyl)- 500 500 78-82-0 Isobutyronitrile d 1,000 1,000 78-94-4 Methyl Vinyl Ketone 10 10 78-97-7 Lactonitrile 1,000 1,000 79-06-1 Acrylamide f 5,000 1,000/10,000 79-11-8 Chloroacetic Acid 100 100/10,000 79-19-6 Thiosemicarbazide 100 100/10,000 79-21-0 Peracetic Acid 500 500 79-22-1 Methyl Chloroformate d 1,000 500 80-63-7 Methyl 2-Chloroacrylate 500 500 81-81-2 Warfarin 100 500/10,000 82-66-6 Diphacinone 10 10/10,000 86-50-0 Azinphos-Methyl 1 10/10,000 86-88-4 ANTU 100 500/10,000 88-05-1 Aniline, 2,4,6-Trimethyl- 500 500 88-85-7 Dinoseb 1,000 100/10,000 91-08-7 Toluene 2,6-Diisocyanate 100 100 95-48-7 Cresol, o- 100 1,000/10,000 98-05-5 Benzenearsonic Acid 10 10/10,000 98-07-7 Benzotrichloride 10 100 98-13-5 Trichlorophenylsilane d 500 500 98-16-8 Benzenamine, 3-(Trifluoromethyl)- 500 500 98-87-3 Benzal Chloride 5,000 500 98-95-3 Nitrobenzene f 1,000 10,000 99-98-9 Dimethyl-p-Phenylenediamine 10 10/10,000 100-14-1 Benzene, 1-(Chloromethyl)-4-Nitro- 500 500/10,000 100-44-7 Benzyl Chloride 100 500 102-36-3 Isocyanic Acid, 3,4-Dichlorophenyl Ester 500 500/10,000 103-85-5 Phenylthiourea 100 100/10,000 106-89-8 Epichlorohydrin f 100 1,000 106-96-7 Propargyl Bromide 10 10 107-02-8 Acrolein 1 500 107-07-3 Chloroethanol 500 500 107-11-9 Allylamine 500 500 107-12-0 Propionitrile 10 500 107-13-1 Acrylonitrile f 100 10,000 107-15-3 Ethylenediamine 5,000 10,000 107-16-4 Formaldehyde Cyanohydrin d 1,000 1,000 107-18-6 Allyl Alcohol 100 1,000 107-30-2 Chloromethyl Methyl Ether b 10 100 107-44-8 Sarin d 10 10 107-49-3 TEPP 10 100 108-05-4 Vinyl Acetate Monomer f 5,000 1,000 108-23-6 Isopropyl Chloroformate 1,000 1,000 108-91-8 Cyclohexylamine f 10,000 10,000 108-95-2 Phenol 1,000 500/10,000 108-98-5 Thiophenol 100 500 109-61-5 Propyl Chloroformate 500 500 109-77-3 Malononitrile 1,000 500/10,000 110-00-9 Furan 100 500 110-57-6 Trans-1,4-Dichlorobutene 500 500 110-89-4 Piperidine 1,000 1,000 111-44-4 Dichloroethyl Ether 10 10,000 111-69-3 Adiponitrile f 1,000 1,000 115-21-9 Trichloroethylsilane d 500 500 115-26-4 Dimefox 500 500 115-29-7 Endosulfan 1 10/10,000 115-90-2 Fensulfothion d 500 500 116-06-3 Aldicarb b 1 100/10,000 119-38-0 Isopropylmethyl-pyrazolyl Dimethylcarbamate 100 500 123-31-9 Hydroquinone f 100 500/10,000 123-73-9 Crotonaldehyde, (E)- 100 1,000 124-65-2 Sodium Cacodylate 100 100/10,000 124-87-8 Picrotoxin 500 500/10,000 126-98-7 Methacrylonitrile d 1,000 500 129-00-0 Pyrene b 5,000 1,000/10,000 129-06-6 Warfarin Sodium d 100 100/10,000 140-29-4 Benzyl Cyanide d 500 500 140-76-1 Pyridine, 2-Methyl-5-Vinyl- 500 500 141-66-2 Dicrotophos 100 100 143-33-9 Sodium Cyanide (Na(CN)) a 10 100 144-49-0 Fluoroacetic Acid 10 10/10,000 149-74-6 Dichloromethylphenylsilane 1,000 1,000 151-38-2 Methoxyethylmercuric Acetate 500 500/10,000 151-50-8 Potassium Cyanide a 10 100 151-56-4 Ethyleneimine 1 500 152-16-9 Diphosphoramide, Octamethyl- 100 100 297-78-9 Isobenzan 100 100/10,000 297-97-2 Thionazin 100 500 298-00-0 Parathion-Methyl b 100 100/10,000 298-02-2 Phorate 10 10 298-04-4 Disulfoton 1 500 300-62-9 Amphetamine 1,000 1,000 302-01-2 Hydrazine 1 1,000 309-00-2 Aldrin 1 500/10,000 315-18-4 Mexacarbate 1,000 500/10,000 316-42-7 Emetine, Dihydrochloride d 1 1/10,000 327-98-0 Trichloronate e 500 500 353-42-4 Boron Trifluoride Compound With Methyl Ether (1:1) 1,000 1,000 359-06-8 Fluoroacetyl Chloride b 10 10 371-62-0 Ethylene Fluorohydrin b, d 10 10 379-79-3 Ergotamine Tartrate 500 500/10,000 465-73-6 Isodrin 1 100/10,000 470-90-6 Chlorfenvinfos 500 500 502-39-6 Methylmercuric Dicyanamide 500 500/10,000 504-24-5 Pyridine, 4-Amino- d 1,000 500/10,000 505-60-2 Mustard Gas d 500 500 506-61-6 Potassium Silver Cyanide a 1 500 506-68-3 Cyanogen Bromide 1,000 500/10,000 506-78-5 Cyanogen Iodide 1,000 1,000/10,000 509-14-8 Tetranitromethane 10 500 514-73-8 Dithiazanine Iodide 500 500/10,000 534-07-6 Bis(Chloromethyl) Ketone 10 10/10,000 534-52-1 Dinitrocresol 10 10/10,000 535-89-7 Crimidine 100 100/10,000 538-07-8 Ethylbis(2-Chloroethyl)Amine d 500 500 541-25-3 Lewisite b, d 10 10 541-53-7 Dithiobiuret 100 100/10,000 542-76-7 Propionitrile, 3-Chloro- 1,000 1,000 542-88-1 Chloromethyl Ether d 10 100 542-90-5 Ethylthiocyanate 10,000 10,000 555-77-1 Tris(2-Chloroethyl)Amine d 100 100 556-61-6 Methyl Isothiocyanate a 500 500 556-64-9 Methyl Thiocyanate 10,000 10,000 558-25-8 Methanesulfonyl Fluoride 1,000 1,000 563-12-2 Ethion 10 1,000 563-41-7 Semicarbazide Hydrochloride 1,000 1,000/10,000 584-84-9 Toluene 2,4-Diisocyanate 100 500 594-42-3 Perchloromethylmercaptan 100 500 597-64-8 Tetraethyltin b 100 100 614-78-8 Thiourea, (2-Methylphenyl)- 500 500/10,000 624-83-9 Methyl Isocyanate 10 500 627-11-2 Chloroethyl Chloroformate 1,000 1,000 630-60-4 Ouabain b 100 100/10,000 639-58-7 Triphenyltin Chloride 500 500/10,000 640-19-7 Fluoroacetamide 100 100/10,000 644-64-4 Dimetilan 1 500/10,000 675-14-9 Cyanuric Fluoride 100 100 676-97-1 Methyl Phosphonic Dichloride a 100 100 696-28-6 Phenyl Dichloroarsine d 1 500 760-93-0 Methacrylic Anhydride 500 500 786-19-6 Carbophenothion 500 500 814-49-3 Diethyl Chlorophosphate d 500 500 814-68-6 Acrylyl Chloride d 100 100 824-11-3 Trimethylolpropane Phosphite d 100 100/10,000 900-95-8 Stannane, Acetoxytriphenyl- c 500 500/10,000 919-86-8 Demeton-S-Methyl 500 500 920-46-7 Methacryloyl Chloride 100 100 944-22-9 Fonofos 500 500 947-02-4 Phosfolan 100 100/10,000 950-10-7 Mephosfolan 500 500 950-37-8 Methidathion 500 500/10,000 991-42-4 Norbormide 100 100/10,000 998-30-1 Triethoxysilane 500 500 999-81-5 Chlormequat Chloride d 100 100/10,000 1031-47-6 Triamiphos 500 500/10,000 1066-45-1 Trimethyltin Chloride 500 500/10,000 1122-60-7 Nitrocyclohexane 500 500 1124-33-0 Pyridine, 4-Nitro-,1-Oxide 500 500/10,000 1129-41-5 Metolcarb 1,000 100/10,000 1303-28-2 Arsenic Pentoxide 1 100/10,000 1306-19-0 Cadmium Oxide 100 100/10,000 1314-62-1 Vanadium Pentoxide 1,000 100/10,000 1314-84-7 Zinc Phosphide a 100 500 1327-53-3 Arsenous Oxide d 1 100/10,000 1397-94-0 Antimycin A b 1,000 1,000/10,000 1420-07-1 Dinoterb 500 500/10,000 1464-53-5 Diepoxybutane 10 500 1558-25-4 Trichloro(Chloromethyl)Silane 100 100 1563-66-2 Carbofuran 10 10/10,000 1600-27-7 Mercuric Acetate 500 500/10,000 1622-32-8 Ethanesulfonyl Chloride, 2-Chloro- 500 500 1752-30-3 Acetone Thiosemicarbazide 1,000 1,000/10,000 1910-42-5 Paraquat Dichloride 10 10/10,000 1982-47-4 Chloroxuron 500 500/10,000 2001-95-8 Valinomycin b 1,000 1,000/10,000 2032-65-7 Methiocarb 10 500/10,000 2074-50-2 Paraquat Methosulfate 10 10/10,000 2097-19-0 Phenylsilatrane d 100 100/10,000 2104-64-5 EPN 100 100/10,000 2223-93-0 Cadmium Stearate b 1,000 1,000/10,000 2231-57-4 Thiocarbazide 1,000 1,000/10,000 2238-07-5 Diglycidyl Ether 1,000 1,000 2275-18-5 Prothoate 100 100/10,000 2497-07-6 Oxydisulfoton d 500 500 2524-03-0 Dimethyl Phosphorochloridothioate 500 500 2540-82-1 Formothion 100 100 2570-26-5 Pentadecylamine 100 100/10,000 2587-90-8 Phosphorothioic Acid, O,O-Dimethyl-S-(2-Methylthio) Ethyl Ester b, c 500 500 2631-37-0 Promecarb d 1,000 500/10,000 2636-26-2 Cyanophos 1,000 1,000 2642-71-9 Azinphos-Ethyl 100 100/10,000 2665-30-7 Phosphonothioic Acid, Methyl-, O-(4-Nitrophenyl) O-Phenyl Ester 500 500 2703-13-1 Phosphonothioic Acid, Methyl-, O-Ethyl O-(4-(Methylthio)Phenyl) Ester 500 500 2757-18-8 Thallous Malonate b, d 100 100/10,000 2763-96-4 Muscimol 1,000 500/10,000 2778-04-3 Endothion 500 500/10,000 3037-72-7 Silane, (4-Aminobutyl)Diethoxymethyl- 1,000 1,000 3254-63-5 Phosphoric Acid, Dimethyl 4-(Methylthio)Phenyl Ester 500 500 3569-57-1 Sulfoxide, 3-Chloropropyl Octyl 500 500 3615-21-2 Benzimidazole, 4,5-Dichloro-2-(Trifluoromethyl)- c 500 500/10,000 3689-24-5 Sulfotep 100 500 3691-35-8 Chlorophacinone 100 100/10,000 3734-97-2 Amiton Oxalate 100 100/10,000 3735-23-7 Methyl Phenkapton 500 500 3878-19-1 Fuberidazole 100 100/10,000 4044-65-9 Bitoscanate 500 500/10,000 4098-71-9 Isophorone Diisocyanate g 500 500 4104-14-7 Phosacetim 100 100/10,000 4170-30-3 Crotonaldehyde 100 1,000 4301-50-2 Fluenetil 100 100/10,000 4418-66-0 Phenol, 2,2′-Thiobis(4-Chloro-6-Methyl)- 100 100/10,000 4835-11-4 Hexamethylenediamine, N,N′-Dibutyl- 500 500 5344-82-1 Thiourea, (2-Chlorophenyl)- 100 100/10,000 5836-29-3 Coumatetralyl 500 500/10,000 6533-73-9 Thallous Carbonate b, d 100 100/10,000 6923-22-4 Monocrotophos 10 10/10,000 7446-09-5 Sulfur Dioxide f 500 500 7446-11-9 Sulfur Trioxide a 100 100 7446-18-6 Thallous Sulfate 100 100/10,000 7487-94-7 Mercuric Chloride 500 500/10,000 7550-45-0 Titanium Tetrachloride 1,000 100 7580-67-8 Lithium Hydride a 100 100 7631-89-2 Sodium Arsenate 1 1,000/10,000 7637-07-2 Boron Trifluoride 500 500 7647-01-0 Hydrogen Chloride (gas only) f 5,000 500 7664-39-3 Hydrogen Fluoride 100 100 7664-41-7 Ammonia f 100 500 7664-93-9 Sulfuric Acid 1,000 1,000 7697-37-2 Nitric Acid 1,000 1,000 7719-12-2 Phosphorus Trichloride 1,000 1,000 7722-84-1 Hydrogen Peroxide (Conc >52%) f 1,000 1,000 7723-14-0 Phosphorus a, d 1 100 7726-95-6 Bromine f 500 500 7778-44-1 Calcium Arsenate 1 500/10,000 7782-41-4 Fluorine e 10 500 7782-50-5 Chlorine 10 100 7783-00-8 Selenious Acid 10 1,000/10,000 7783-06-4 Hydrogen Sulfide f 100 500 7783-07-5 Hydrogen Selenide 10 10 7783-60-0 Sulfur Tetrafluoride 100 100 7783-70-2 Antimony Pentafluoride 500 500 7783-80-4 Tellurium Hexafluoride e 100 100 7784-34-1 Arsenous Trichloride 1 500 7784-42-1 Arsine 100 100 7784-46-5 Sodium Arsenite 1 500/10,000 7786-34-7 Mevinphos 10 500 7791-12-0 Thallous Chloride b, d 100 100/10,000 7791-23-3 Selenium Oxychloride 500 500 7803-51-2 Phosphine 100 500 8001-35-2 Camphechlor 1 500/10,000 8065-48-3 Demeton 500 500 10025-73-7 Chromic Chloride 1 1/10,000 10025-87-3 Phosphorus Oxychloride 1,000 500 10026-13-8 Phosphorus Pentachloride a 500 500 10028-15-6 Ozone 100 100 10031-59-1 Thallium Sulfate d 100 100/10,000 10102-18-8 Sodium Selenite d 100 100/10,000 10102-20-2 Sodium Tellurite 500 500/10,000 10102-43-9 Nitric Oxide b 10 100 10102-44-0 Nitrogen Dioxide 10 100 10124-50-2 Potassium Arsenite 1 500/10,000 10140-87-1 Ethanol, 1,2-Dichloro-, Acetate 1,000 1,000 10210-68-1 Cobalt Carbonyl d 10 10/10,000 10265-92-6 Methamidophos 100 100/10,000 10294-34-5 Boron Trichloride 500 500 10311-84-9 Dialifor 100 100/10,000 10476-95-6 Methacrolein Diacetate 1,000 1,000 12002-03-8 Paris Green 1 500/10,000 12108-13-3 Manganese, Tricarbonyl Methylcyclopentadienyl d 100 100 13071-79-9 Terbufosh d 100 100 13171-21-6 Phosphamidon 100 100 13194-48-4 Ethoprophos 1,000 1,000 13410-01-0 Sodium Selenate 100 100/10,000 13450-90-3 Gallium Trichloride 500 500/10,000 13463-39-3 Nickel Carbonyl 10 1 13463-40-6 Iron, Pentacarbonyl- 100 100 14167-18-1 Salcomine 500 500/10,000 15271-41-7 Bicyclo[2.2.1]Heptane-2-Carbonitrile, 5-Chloro-6-((((Methylamino)Carbonyl)Oxy)Imino)-, (1s-(1-alpha,2-beta,4-alpha,5-alpha,6E))- 500 500/10,000 16752-77-5 Methomyl d 100 500/10,000 17702-41-9 Decaborane(14) 500 500/10,000 17702-57-7 Formparanate 100 100/10,000 19287-45-7 Diborane 100 100 19624-22-7 Pentaborane 500 500 20830-75-5 Digoxin d 10 10/10,000 20859-73-8 Aluminum Phosphide a 100 500 21548-32-3 Fosthietan 500 500 21609-90-5 Leptophos 500 500/10,000 21908-53-2 Mercuric Oxide 500 500/10,000 21923-23-9 Chlorthiophos d 500 500 22224-92-6 Fenamiphos 10 10/10,000 23135-22-0 Oxamyl 100 100/10,000 23422-53-9 Formetanate Hydrochloride d 100 500/10,000 23505-41-1 Pirimifos-Ethyl 1,000 1,000 24017-47-8 Triazofos 500 500 24934-91-6 Chlormephos 500 500 26419-73-8 Carbamic Acid, Methyl-, O-(((2,4-Dimethyl-1, 3-Dithiolan-2-yl)Methylene)Amino)- 100 100/10,000 26628-22-8 Sodium Azide (Na(N 3 a 1,000 500 27137-85-5 Trichloro(Dichlorophenyl)Silane 500 500 28347-13-9 Xylylene Dichloride 100 100/10,000 28772-56-7 Bromadiolone 100 100/10,000 30674-80-7 Methacryloyloxyethyl Isocyanateh 100 100 39196-18-4 Thiofanox 100 100/10,000 50782-69-9 Phosphonothioic Acid, Methyl-, S-(2-(Bis(1-Methylethyl)Amino)Ethyl) O-Ethyl Ester 100 100 53558-25-1 Pyriminil d 100 100/10,000 58270-08-9 Zinc, Dichloro(4,4-Dimethyl-5((((Methylamino) Carbonyl)Oxy)Imino)Pentanenitrile)-, (T-4)- 100 100/10,000 62207-76-5 Cobalt, ((2,2′-(1,2-Ethanediylbis (Nitrilomethylidyne)) Bis(6-Fluorophenolato)) (2-)-N,N′,O,O′)- 100 100/10,000 * Only the statutory or final RQ is shown. For more information, see Notes: a. This material is a reactive solid. The TPQ does not default to 10,000 pounds for non-powder, non-molten, non-solution form. b. The calculated TPQ changed after technical review as described in a technical support document for the final rule, April 22, 1987. c. Chemicals added by final rule, April 22, 1987. d. Revised TPQ based on new or re-evaluated toxicity data, April 22, 1987. e. The TPQ was revised due to calculation error, April 22, 1987. f. Chemicals on the original list that do not meet toxicity criteria but because of their acute lethality, high production volume and known risk are considered chemicals of concern (“Other chemicals”). (November 17, 1986, and February 15, 1990.) g. The TPQ was recalculated (September 8, 2003) since it was mistakenly calculated in the April 22, 1987, final rule under the wrong assumption that this chemical is a reactive solid, when in fact it is a liquid. RQ for this chemical was adjusted on September 11, 2006.