21 CFR 556.275
§ 556.275 Fenbendazole.
United States · 21 CFR — Food and Drugs · Status: effective
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- Citation
- 21 CFR 556.275, § 556.275 Fenbendazole, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87767
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Full text
(a) Acceptable daily intake (ADI). The ADI for total residue of fenbendazole is 40 µg/kg of body weight per day.
(b) Tolerances. The tolerances for fenbendazole are:
(1) Cattle.
(i) Liver (target tissue): 0.8 ppm fenbendazole (marker residue).
(ii) Milk: 0.22 ppm fenbendazole sulfoxide (marker residue).
(2) Chickens.
(i) Liver (target tissue): 5.2 ppm fenbendazole sulfone (marker residue).
(ii) Eggs: 1.8 ppm fenbendazole sulfone (marker residue).
(3) Goats.
(i) Liver (target tissue): 0.8 ppm fenbendazole (marker residue).
(ii) [Reserved]
(4) Swine.
(i) Liver (target tissue): 3.2 ppm fenbendazole (marker residue).
(ii) [Reserved]
(5) Turkeys.
(i) Liver (target tissue): 6 ppm fenbendazole sulfone (marker residue).
(ii) [Reserved]
(6) Quail.
(i) Liver (target tissue): 6 ppm fenbendazole sulfone (marker residue).
(ii) [Reserved]
(c) Related conditions of use. See §§ 520.905a, 520.905b, 520.905c, 520.905d, and 558.258 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.