21 CFR 556.150
§ 556.150 Chlortetracycline.
United States · 21 CFR — Food and Drugs · Status: effective
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- Citation
- 21 CFR 556.150, § 556.150 Chlortetracycline, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87748
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Full text
(a) Acceptable daily intake (ADI). The ADI for total residue of tetracyclines including 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) Liver: 6 ppm.
(ii) Kidney and fat: 12 ppm.
(iii) Muscle: 2 ppm.
(2) Chickens, turkeys, and ducks.
(i) Liver: 6 ppm.
(ii) Kidney and fat: 12 ppm.
(iii) Muscle: 2 ppm.
(iv) Eggs: 0.4 ppm for chlortetracycline only.
(3) Sheep.
(i) Liver: 6 ppm.
(ii) Kidney and fat: 12 ppm.
(iii) Muscle: 2 ppm.
(4) Swine.
(i) Liver: 6 ppm.
(ii) Kidney and fat: 12 ppm.
(iii) Muscle: 2 ppm.
(c) Related conditions of use. See §§ 520.441, 520.443, 520.445, 558.128, and 558.140 of this chapter.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.