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U.S. Department of Health and Human Services

CFR - Code of Federal Regulations Title 21

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The information on this page is current as of April 1 2020.

For the most up-to-date version of CFR Title 21, go to the Electronic Code of Federal Regulations (eCFR).

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Help | More About 21CFR
[Code of Federal Regulations]
[Title 21, Volume 6]
[Revised as of April 1, 2020]
[CITE: 21CFR556.113]



TITLE 21--FOOD AND DRUGS
CHAPTER I--FOOD AND DRUG ADMINISTRATION
DEPARTMENT OF HEALTH AND HUMAN SERVICES
SUBCHAPTER E - ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS

PART 556 -- TOLERANCES FOR RESIDUES OF NEW ANIMAL DRUGS IN FOOD

Subpart B - Specific Tolerances for Residues of Approved and Conditionally Approved New Animal Drugs

Sec. 556.113 Ceftiofur.

(a) Acceptable daily intake and acute reference dose - (1) Acceptable daily intake (ADI). The ADI for total residue of ceftiofur is 30 [micro]g/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.

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