21 C.F.R. § 556.500

Oxytetracycline.

Last amended: 2023Year: 2026Length: 157 wordsSubsections: 4Official source

Cite as 21 C.F.R. § 556.500 (2026)

(a) Acceptable daily intake (ADI). The ADI for total tetracycline residues (chlortetracycline, oxytetracycline, and tetracycline) is 25 µg/kg of body weight per day. (b) Tolerances. The tolerances for the sum of tetracycline residues are: (1) Cattle. (i) Muscle: 2 ppm. (ii) Liver: 6 ppm. (iii) Fat and kidney: 12 ppm. (iv) Milk: 0.3 ppm. (2) Chickens and turkeys. (i) Muscle: 2 ppm. (ii) Liver: 6 ppm. (iii) Fat and kidney: 12 ppm. (3) Finfish. Muscle (with adhering skin when edible): 2 ppm. (4) Lobster. Muscle: 2 ppm. (5) Swine and sheep. (i) Muscle: 2 ppm. (ii) Liver: 6 ppm. (iii) Fat and kidney: 12 ppm. (6) Honey. 750 ppb. (c) Related conditions of use. See §§ 520.1660c, 520.1660d, 520.1664, 522.1660a, 522.1660b, 522.1662, 522.1664, 529.1660, 558.450, and 558.455 of this chapter. [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]
Cross-references to the CFR
520.1660c
21 C.F.R. § 556.500: Oxytetracycline. | Justis AI