PART 556—TOLERANCES FOR RESIDUES OF NEW ANIMAL DRUGS IN FOOD Authority: 21 U.S.C. 342, 360b, 371. Source: 84 FR 32993, July 11, 2019, unless otherwise noted. Subpart A—General Provisions § 556.1 Scope. (a) The Federal Food, Drug, and Cosmetic Act requires an applicant seeking approval or conditional approval of a new animal drug to submit a proposed tolerance as part of its new animal drug application when such a tolerance is needed to assure that the proposed use of the new animal drug will be safe (see sections 512(b)(1)(H) and 571(a)(2)(A) of the Federal Food, Drug, and Cosmetic Act). FDA assigns tolerances for animal drugs used in food-producing animals as part of the application approval process. Tolerances for approved and conditionally approved new animal drugs are codified in subpart B of this part. (b) Compounds that have been found to be carcinogenic are regulated under subpart E of part 500 of this chapter. § 556.3 Definitions. As used in this part: Acceptable daily intake (ADI) Acute reference dose (ARfD) Edible tissues Marker residue mg/kg Not required, (1) No withdrawal period was necessary for residues of the drug to deplete to or below the concentrations considered to be safe, or an adequate withdrawal period was inherent in the proposed drug use, and there was a rapid depletion of residues, so there was no concern about residues resulting from misuse or overdosing; or (2) No withdrawal period was necessary because the drug was poorly absorbed or metabolized rapidly so as to make selection of an analyte impractical or impossible. ppb ppm ppt Residue Target tissue Tolerance Total residue µg/kg Zero, § 556.5 General considerations. (a) The tolerances listed in subpart B of this part pertain only to the species and production classes of the animal for which the drug use has been approved or conditionally approved. Approved and conditionally approved conditions of use in parts 516, 520, 522, 524, 526, 529, and 558 of this chapter, including the species and production classes of animals, are referenced in each tolerance section in subpart B of this part. (b) All tolerances refer to the concentrations of a marker residue, or other residue indicated for monitoring, permitted in uncooked tissues. (c) After a tolerance is listed, the finding that the concentration of the marker residue in the target tissue from a tested animal is at or below the tolerance indicates that all edible tissues (excluding milk and eggs unless otherwise indicated) from that tested animal are safe for human consumption. If a listed tolerance is not expressly linked to a target tissue, then the tolerance is specific only for the named edible tissue and inferences cannot be made about the safety of the other edible tissues from the tested animal. (d) FDA requires that a drug sponsor submit a practicable method as part of their new animal drug application. FDA uses the practicable method to determine the quantity of the drug residues that can safely remain in edible tissues ( i.e., Subpart B—Specific Tolerances for Residues of Approved and Conditionally Approved New Animal Drugs § 556.34 Albendazole. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 0.05 ppm. (2) Sheep. (ii) Muscle: 0.05 ppm. (3) Goat. (ii) [Reserved] (c) Related conditions of use. § 556.36 Altrenogest. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Swine. (ii) Muscle: 1 ppb. (2) [Reserved] (c) Related conditions of use. § 556.38 Amoxicillin. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) [Reserved] (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 86 FR 13188, Mar. 8, 2021] § 556.40 Ampicillin. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) Swine. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18120, Apr. 1, 2020] § 556.50 Amprolium. (a) [Reserved] (b) Tolerances. (1) Cattle. (ii) Fat: 2.0 ppm. (2) Chickens and turkeys. (ii) Muscle: 0.5 ppm. (iii) Eggs: (A) Egg yolks: 8 ppm. (B) Whole eggs: 4 ppm. (3) Pheasants. (ii) Muscle: 0.5 ppm. (c) Related conditions of use. § 556.52 Apramycin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Swine. (2) [Reserved] (c) Related conditions of use. § 556.60 Avilamycin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Chickens. (2) Swine. (c) Related conditions of use. § 556.68 Azaperone. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Swine. (2) [Reserved] (c) Related conditions of use. § 556.70 Bacitracin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (2) Chickens, turkeys, pheasants, quail. (3) Swine. (c) Related conditions of use. § 556.75 Bambermycins. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) Chickens and turkeys. (3) Swine. (c) Related conditions of use. § 556.100 Carbadox. (a) [Reserved] (b) Tolerances. (1) Swine. (2) [Reserved] (c) Related conditions of use. § 556.110 Carbomycin. (a) [Reserved] (b) Tolerances. (1) Chickens. (2) [Reserved] (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 88 FR 55567, Aug. 16, 2023] § 556.113 Ceftiofur. (a) Acceptable daily intake and acute reference dose Acceptable daily intake (ADI). (2) Acute reference dose (ARfD). (b) Tolerances. (1) Cattle. (ii) Liver: 2 ppm. (iii) Muscle: 1 ppm. (iv) Milk: 0.1 ppm. (2) Chickens and turkeys. (3) Goats. (ii) Liver: 2 ppm. (iii) Muscle: 1 ppm. (iv) Milk: 0.1 ppm. (4) Sheep. (5) Swine. (ii) Liver: 3 ppm. (iii) Muscle: 2 ppm. (c) Related conditions of use. § 556.115 Cephapirin. (a) [Reserved] (b) Tolerances. (1) Cattle. (ii) Milk: 0.02 ppm. (2) [Reserved] (c) Related conditions of use. § 556.118 Chloramine-T. (a) Acceptable daily intake (ADI). (b) Tolerances. para (1) Fish. (2) [Reserved] (c) Related conditions of use. § 556.120 Chlorhexidine. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) [Reserved] (c) Related conditions of use. § 556.150 Chlortetracycline. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Kidney and fat: 12 ppm. (iii) Muscle: 2 ppm. (2) Chickens, turkeys, and ducks. (ii) Kidney and fat: 12 ppm. (iii) Muscle: 2 ppm. (iv) Eggs: 0.4 ppm for chlortetracycline only. (3) Sheep. (ii) Kidney and fat: 12 ppm. (iii) Muscle: 2 ppm. (4) Swine. (ii) Kidney and fat: 12 ppm. (iii) Muscle: 2 ppm. (c) Related conditions of use. § 556.160 Clopidol. (a) [Reserved] (b) Tolerances. (1) Chickens and turkeys. (ii) Muscle: 5 ppm. (2) [Reserved] (c) Related conditions of use. § 556.163 Clorsulon. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 0.1 ppm. (2) [Reserved] (c) Related conditions of use. § 556.165 Cloxacillin. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) [Reserved] (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020; 86 FR 13188, Mar. 8, 2021] § 556.167 Colistimethate. (a) [Reserved] (b) Tolerances. (1) Chickens. (2) [Reserved] (c) Related conditions of use. § 556.168 Coumaphos. (a) [Reserved] (b) Tolerances. (1) Chickens. (ii) Eggs: 0.1 ppm. (2) [Reserved] (c) Related conditions of use. [86 FR 14821, Mar. 19, 2021] § 556.169 Danofloxacin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 0.2 ppm. (2) [Reserved] (c) Related conditions of use. § 556.170 Decoquinate. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Other edible tissues (excluding milk): 2 ppm. (2) Chickens. (ii) Other edible tissues (excluding eggs): 2 ppm. (3) Goats. (ii) Other edible tissues (excluding milk): 2 ppm. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 86 FR 13188, Mar. 8, 2021] § 556.180 Dichlorvos. (a) [Reserved] (b) Tolerances. (1) Swine. (2) [Reserved] (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 86 FR 13188, Mar. 8, 2021] § 556.185 Diclazuril. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Chickens and turkeys. (ii) Muscle: 0.5 ppm. (iii) Skin/fat: 1 ppm. (2) [Reserved] (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 86 FR 13188, Mar. 8, 2021] § 556.200 Dihydrostreptomycin. (a) [Reserved] (b) Tolerances. (1) Cattle. (ii) Other edible tissues (excluding milk): 0.5 ppm. (iii) Milk: 0.125 ppm. (2) Swine. (ii) Other edible tissues: 0.5 ppm. (c) Related conditions of use. § 556.222 Doramectin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 30 ppb. (2) Swine. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 88 FR 16549, Mar. 20, 2023] § 556.224 Efrotomycin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Swine. (2) [Reserved] (c) Related conditions of use. § 556.226 Enrofloxacin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (2) Swine. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 86 FR 13188, Mar. 8, 2021] § 556.227 Eprinomectin. (a) Acceptable daily intake (ADI). (b) Tolerances. 1a (1) Cattle. (ii) Muscle: 100 ppb. (iii) Milk: 12 ppb. (2) [Reserved] (c) Related conditions of use. § 556.230 Erythromycin. (a) [Reserved] (b) Tolerances. (1) Cattle. (ii) Milk: Zero. (2) Chickens and turkeys. (ii) Eggs: 0.025 ppm. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020] § 556.240 Estradiol and related esters. (a) [Reserved] (b) Residues. (1) Cattle. (ii) Liver: 0.6 ppb. (iii) Kidney: 1.2 ppb. (iv) Fat: 1.2 ppb. (2) [Reserved] (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 87 FR 17947, Mar. 29, 2022] § 556.260 Ethopabate. (a) [Reserved] (b) Tolerances. (1) Chickens. (ii) Kidney: 1.5 ppm. (iii) Muscle: 0.5 ppm. (2) [Reserved] (c) Related conditions of use. § 556.273 Famphur. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) [Reserved] (c) Related conditions of use. § 556.275 Fenbendazole. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Milk: 0.22 ppm fenbendazole sulfoxide (marker residue). (2) Chickens. (ii) Eggs: 1.8 ppm fenbendazole sulfone (marker residue). (3) Goats. (ii) [Reserved] (4) Swine. (ii) [Reserved] (5) Turkeys. (ii) [Reserved] (6) Quail. (ii) [Reserved] (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 86 FR 57998, Oct. 20, 2021; 86 FR 61686, Nov. 8, 2021; 89 FR 85428, Oct. 28, 2024] § 556.277 Fenprostalene. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (2) Swine. (c) Related conditions of use. § 556.280 Fenthion. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) [Reserved] (c) Related conditions of use. § 556.283 Florfenicol. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 0.3 ppm. (2) Swine. (ii) Muscle: 0.2 ppm. (3) Catfish. (4) Freshwater-reared warmwater finfish (other than catfish) and salmonids. (c) Related conditions of use. § 556.286 Flunixin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 25 ppb flunixin free acid. (iii) Milk: 2 ppb 5-hydroxy flunixin (marker residue). (2) Swine. (ii) Muscle: 25 ppb flunixin free acid. (c) Related conditions of use. § 556.290 Fluralaner. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Chickens. (ii) Muscle: 110 ppb. (iii) Eggs: 2500 ppb. (2) Cattle. (ii) Muscle: 350 ppb. (c) Related conditions of use. [91 FR 5301, Feb. 6, 2026, as amended at 91 FR 41561, July 7, 2026] § 556.292 Gamithromycin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 150 ppb. (2) [Reserved] (c) Related conditions of use. § 556.300 Gentamicin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Chickens and turkeys. (2) Swine. (ii) Kidney (target tissue): 0.4 ppm gentamicin (marker residue). (iii) Fat: 0.4 ppm. (iv) Muscle: 0.1 ppm. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 86 FR 13188, Mar. 8, 2021] § 556.304 Gonadotropin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (2) Fish. (3) Swine. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020] § 556.308 Halofuginone. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Chickens. (2) Turkeys. (c) Related conditions of use. § 556.310 Haloxon. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) [Reserved] (c) Related conditions of use. § 556.316 Hetacillin. (a) [Reserved] (b) Tolerances. (1) Cattle. Edible tissues: (2) [Reserved] (c) Related conditions of use. [84 FR 53311, Oct. 7, 2019] § 556.330 Hygromycin B. (a) [Reserved] (b) Tolerances. (1) Chickens. (2) Swine. (c) Related conditions of use. § 556.344 Ivermectin. (a) Acceptable daily intake (ADI). (b) Tolerances. 1 (1) American bison. (2) Cattle. (ii) Muscle: 650 ppb. (3) Reindeer. (4) Sheep. (5) Swine. (ii) Muscle: 20 ppb. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020] § 556.345 Ketoprofen. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) [Reserved] (c) Related conditions of use. [86 FR 61686, Nov. 8, 2021] § 556.346 Laidlomycin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (2) [Reserved] (c) Related conditions of use. § 556.347 Lasalocid. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (2) Chickens. (ii) Liver: 0.4 ppm. (3) Rabbits. (4) Sheep. (5) Turkeys. (ii) Skin with adhering fat: 0.4 ppm. (c) Related conditions of use. § 556.350 Levamisole. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) Sheep. (3) Swine. (c) Related conditions of use. § 556.360 Lincomycin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Chickens. (2) Swine. (ii) Muscle: 0.1 ppm. (3) Honey. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020] Editorial Note: At 86 FR 13188, Mar. 8, 2021, in § 556.360, paragraph (c) was amended; however, the amendment could not be incorporated due to inaccurate amendatory instruction. § 556.370 Lubabegron. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 3 ppb. (iii) Kidney: 20 ppb. (2) [Reserved] (c) Related conditions of use. [84 FR 12494, Apr. 2, 2019, as amended at 87 FR 17947, Mar. 29, 2022] § 556.375 Maduramicin. (a) [Reserved] (b) Tolerances. (1) Chickens. (2) [Reserved] (c) Related conditions of use. § 556.380 Melengestrol. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) [Reserved] (c) Related conditions of use. § 556.410 Metoserpate. (a) [Reserved] (b) Tolerances. (1) Chickens. (2) [Reserved] (c) Related conditions of use. § 556.420 Monensin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle, kidney, and fat: 0.05 ppm. (iii) Milk: Not required. (2) Chickens and turkeys. (3) Goats. (4) Quail. (c) Related conditions of use. § 556.425 Morantel. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Milk: Not required. (2) Goats. (ii) Milk: Not required. (c) Related conditions of use. § 556.426 Moxidectin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Liver: 200 ppb. (iii) Muscle: 50 ppb. (iv) Milk: 40 ppb. (2) Sheep. (ii) Liver: 200 ppb. (iii) Muscle: 50 ppb. (c) Related conditions of use. § 556.428 Narasin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Chickens. (2) [Reserved] (c) Related conditions of use. § 556.430 Neomycin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Liver: 3.6 ppm. (iii) Muscle: 1.2 ppm. (iv) Fat: 7.2 ppm. (v) Milk: 0.15 ppm. (2) Sheep and goats. (ii) Liver: 3.6 ppm. (iii) Muscle: 1.2 ppm. (iv) Fat: 7.2 ppm. (v) Milk: 0.15 ppm. (3) Swine. (ii) Liver: 3.6 ppm. (iii) Muscle: 1.2 ppm. (iv) Fat: 7.2 ppm. (4) Turkeys. (ii) Liver: 3.6 ppm. (iii) Muscle: 1.2 ppm. (c) Related conditions of use. § 556.445 Nicarbazin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Chickens. (2) [Reserved] (c) Related conditions of use. § 556.460 Novobiocin. (a) [Reserved] (b) Tolerances. (1) Cattle. (ii) Milk: 0.1 ppm. (2) Chickens, turkeys, and ducks. (c) Related conditions of use. § 556.470 Nystatin. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) Chickens and turkeys. (c) Related conditions of use. § 556.490 Ormetoprim. (a) [Reserved] (b) Tolerances. (1) Chickens, turkeys, ducks, and chukar partridges. (2) Salmonids and catfish. (c) Related conditions of use. § 556.495 Oxfendazole. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (2) [Reserved] (c) Related conditions of use. § 556.500 Oxytetracycline. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Liver: 6 ppm. (iii) Fat and kidney: 12 ppm. (iv) Milk: 0.3 ppm. (2) Chickens and turkeys. (ii) Liver: 6 ppm. (iii) Fat and kidney: 12 ppm. (3) Finfish. (4) Lobster. (5) Swine and sheep. (ii) Liver: 6 ppm. (iii) Fat and kidney: 12 ppm. (6) Honey. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020; 88 FR 16549, Mar. 20, 2023, 88 FR 55567, Aug. 16, 2023] § 556.510 Penicillin. (a) [Reserved] (b) Tolerances. (1) Cattle. (ii) Milk: Zero. (2) Chickens. (3) Pheasants and quail. (4) Sheep and swine. (5) Turkeys. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020; 86 FR 13188, Mar. 8, 2021] § 556.515 Pirlimycin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 0.3 ppm. (iii) Milk: 0.4 ppm. (2) [Reserved] (c) Related conditions of use. § 556.517 Poloxalene. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) [Reserved] (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 86 FR 14821, Mar. 19, 2021] § 556.530 Pradofloxacin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (2) Swine. (c) Related conditions of use. [89 FR 85428, Oct. 28, 2024] § 556.540 Progesterone. (a) [Reserved] (b) Residues. (1) Cattle and sheep. (ii) Liver: 15 ppb. (iii) Kidney: 30 ppb. (iv) Fat: 30 ppb. (2) [Reserved] (c) Related conditions of use. § 556.560 Pyrantel. (a) [Reserved] (b) Tolerances. (1) Swine. (ii) Muscle: 1 ppm. (2) [Reserved] (c) Related conditions of use. § 556.570 Ractopamine. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 0.03 ppm. (2) Swine. (ii) Muscle: 0.05 ppm. (3) Turkeys. (ii) Muscle: 0.1 ppm. (c) Related conditions of use. § 556.580 Robenidine. (a) [Reserved] (b) Tolerances. (1) Chickens. (ii) Other edible tissues (excluding eggs): 0.1 ppm. (2) [Reserved] (c) Related conditions of use. § 556.592 Salinomycin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Chickens. (2) Quail. (c) Related conditions of use. § 556.597 Semduramicin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Chickens. (ii) Muscle: 130 ppb. (2) [Reserved] (c) Related conditions of use. § 556.600 Spectinomycin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 0.25 ppm. (2) Chickens and turkeys. (3) Swine. (c) Related conditions of use. § 556.610 Streptomycin. (a) [Reserved] (b) Tolerances. (1) Cattle and swine. (ii) Other edible tissues (excluding milk): 0.5 ppm. (2) Chickens. (ii) Other edible tissues (excluding eggs): 0.5 ppm. (c) Related conditions of use. § 556.625 Sulfachloropyrazine. (a) [Reserved] (b) Tolerances. (1) Chickens. (2) [Reserved] (c) Related conditions of use. § 556.630 Sulfachlorpyridazine. (a) [Reserved] (b) Tolerances. (1) Cattle and swine. (2) [Reserved] (c) Related conditions of use. § 556.640 Sulfadimethoxine. (a) [Reserved] (b) Tolerances. (1) Catfish and salmonids. (2) Cattle. (ii) Milk: 0.01 ppm. (3) Chickens, turkeys, ducks, and chukar partridges. (c) Related conditions of use. § 556.650 Sulfaethoxypyridazine. (a) [Reserved] (b) Tolerances. (1) Cattle. (ii) Milk: Zero. (2) Swine. (c) Related conditions of use. § 556.660 Sulfamerazine. (a) [Reserved] (b) Tolerances. (1) Trout. (2) [Reserved] (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020] § 556.670 Sulfamethazine. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) Chickens and turkeys. (3) Swine. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020; 86 FR 13188, Mar. 8, 2021] § 556.685 Sulfaquinoxaline. (a) [Reserved] (b) Tolerances. (1) Cattle. (2) Chickens and turkeys. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020] § 556.700 Sulfomyxin. (a) [Reserved] (b) Tolerances. (1) Chickens and turkeys. (2) [Reserved] (c) Related conditions of use. § 556.710 Testosterone. (a) [Reserved] (b) Residues. (1) Cattle. (ii) Kidney: 1.9 ppb. (iii) Liver: 1.3 ppb. (iv) Muscle: 0.64 ppb. (2) [Reserved] (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 87 FR 10970, Feb. 28, 2022] § 556.720 Tetracycline. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle and sheep. (ii) Liver: 6 ppm. (iii) Muscle: 2 ppm. (2) Chickens and turkeys. (ii) Liver: 6 ppm. (iii) Muscle: 2 ppm. (3) Swine. (ii) Liver: 6 ppm. (iii) Muscle: 2 ppm. (c) Related conditions of use. § 556.732 Tiamulin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Swine. (2) [Reserved] (c) Related conditions of use. § 556.733 Tildipirosin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) [Reserved] (2) [Reserved] (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020] § 556.735 Tilmicosin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 0.1 ppm. (2) Sheep. (ii) Muscle: 0.1 ppm. (3) Swine. (ii) Muscle: 0.1 ppm. (c) Related conditions of use. § 556.739 Trenbolone. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (2) [Reserved] (c) Related conditions of use. § 556.741 Tripelennamine. (a) [Reserved] (b) Tolerances. (1) Cattle. (ii) Milk: 20 ppb. (2) [Reserved] (c) Related conditions of use. § 556.745 Tulathromycin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (2) Swine. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 86 FR 61686, Nov. 8, 2021] § 556.746 Tylosin. (a) [Reserved] (b) Tolerances. (1) Cattle. (ii) Milk: 0.05 ppm. (2) Chickens and turkeys. (ii) Eggs: 0.2 ppm. (3) Swine. (4) Honey. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020] § 556.748 Tylvalosin. (a) Acceptable daily intake (ADI). (b) Tolerances. (c) Related conditions of use. § 556.750 Virginiamycin. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (2) Chickens. (3) Swine. (ii) Liver: 0.3 ppm. (iii) Muscle: 0.1 ppm. (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020] § 556.760 Zeranol. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (2) Sheep. (c) Related conditions of use. § 556.765 Zilpaterol. (a) Acceptable daily intake (ADI). (b) Tolerances. (1) Cattle. (ii) Muscle: 10 ppb. (2) [Reserved] (c) Related conditions of use. [84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020] § 556.770 Zoalene. (a) [Reserved] (b) Tolerances. o (1) Chickens. (ii) Muscle: 3 ppm. (iii) Fat: 2 ppm. (2) Turkeys. (c) Related conditions of use.