21 CFR 556.540
§ 556.540 Progesterone.
United States · 21 CFR — Food and Drugs · Status: effective
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- Citation
- 21 CFR 556.540, § 556.540 Progesterone, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87805
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Full text
(a) [Reserved]
(b) Residues. Residues of progesterone are not permitted in excess of the following increments above the concentrations of progesterone naturally present in untreated animals:
(1) Cattle and sheep.
(i) Muscle: 5 ppb.
(ii) Liver: 15 ppb.
(iii) Kidney: 30 ppb.
(iv) Fat: 30 ppb.
(2) [Reserved]
(c) Related conditions of use. See §§ 522.1940 and 529.1940 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.