21 CFR 556.240
§ 556.240 Estradiol and related esters.
United States · 21 CFR — Food and Drugs · Status: effective
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- Citation
- 21 CFR 556.240, § 556.240 Estradiol and related esters, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87764
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Full text
(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.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.