21 C.F.R. § 556.240
Estradiol and related esters.
Cite as 21 C.F.R. § 556.240 (2026)
(a) [Reserved]
(b)
Residues.
Residues of estradiol are not permitted in excess of the following increments above the concentrations of estradiol naturally present in untreated animals:
(1)
Cattle.
(i) Muscle: 0.2 ppb.
(ii) Liver: 0.6 ppb.
(iii) Kidney: 1.2 ppb.
(iv) Fat: 1.2 ppb.
(2) [Reserved]
(c)
Related conditions of use.
See §§ 522.840, 522.850, 522.1940, 522.2343, 522.2477, and 522.2478 of this chapter.
[84 FR 32993, July 11, 2019, as amended at 87 FR 17947, Mar. 29, 2022]
- Cross-references to the CFR
- 522.840