21 C.F.R. § 556.540
Progesterone.
Cite as 21 C.F.R. § 556.540 (2026)
(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.
- Cross-references to the CFR
- 522.1940