21 CFR 556.113
§ 556.113 Ceftiofur.
United States · 21 CFR — Food and Drugs · Status: effective
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- Citation
- 21 CFR 556.113, § 556.113 Ceftiofur, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87744
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Full text
(a) Acceptable daily intake and acute reference dose—(1) Acceptable daily intake (ADI). The ADI for total residue of ceftiofur is 30 µg/kg of body weight per day.
(2) Acute reference dose (ARfD). The ARfD for total residue of ceftiofur is 0.830 mg/kg of body weight.
(b) Tolerances. The tolerances for desfuroylceftiofur (marker residue) are:
(1) Cattle.
(i) Kidney (target tissue): 0.4 ppm.
(ii) Liver: 2 ppm.
(iii) Muscle: 1 ppm.
(iv) Milk: 0.1 ppm.
(2) Chickens and turkeys. Edible tissues (excluding eggs): Not required.
(3) Goats.
(i) Kidney (target tissue): 8 ppm.
(ii) Liver: 2 ppm.
(iii) Muscle: 1 ppm.
(iv) Milk: 0.1 ppm.
(4) Sheep. Edible tissues (excluding milk): Not required.
(5) Swine.
(i) Kidney (target tissue): 0.25 ppm.
(ii) Liver: 3 ppm.
(iii) Muscle: 2 ppm.
(c) Related conditions of use. See §§ 522.313a, 522.313b, 522.313c, and 526.313 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.