Oxytetracycline.
21 C.F.R. § 556.500
in effectEffective: 2024-07-01(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.
Source: eCFRURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-21.xmlFetched: 7/26/2026
