About GPO   |   Newsroom/Media   |   Congressional Relations   |   Inspector General   |   Careers   |   Contact   |   askGPO   |   Help  
 
Home   |   Customers   |   Vendors   |   Libraries  

The Electronic Code of Federal Regulations (e-CFR) is a regularly updated, unofficial editorial compilation of CFR material and Federal Register amendments produced by the National Archives and Records Administration's Office of the Federal Register (OFR) and the Government Printing Office.

Parallel Table of Authorities and Rules for the Code of Federal Regulations and the United States Code
Text | PDF

Find, review, and submit comments on Federal rules that are open for comment and published in the Federal Register using Regulations.gov.

Purchase individual CFR titles from the U.S. Government Online Bookstore.

Find issues of the CFR (including issues prior to 1996) at a local Federal depository library.

[2]
 
 

Electronic Code of Federal Regulations

e-CFR Data is current as of July 23, 2014

Title 21: Food and Drugs
PART 556—TOLERANCES FOR RESIDUES OF NEW ANIMAL DRUGS IN FOOD
Subpart B—Specific Tolerances for Residues of New Animal Drugs


§556.113   Ceftiofur.

(a) Acceptable daily intake and acceptable single-dose intake—(1) Acceptable daily intake (ADI). The ADI for total residues of ceftiofur is 30 micrograms per kilogram of body weight per day.

(2) Acceptable single-dose intake (ASDI). The ASDI total residues of ceftiofur is 0.830 milligrams per kilogram of body weight. The ASDI is the amount of total residues of ceftiofur that may safely be consumed in a single meal. The ASDI is used to derive the tolerance for residues of desfuroylceftiofur at the injection site.

(b) Tolerances—(1) Poultry, and sheep. A tolerance for residues of ceftiofur in edible tissue is not required.

(2) Swine. The tolerances for desfuroylceftiofur (marker residue) are:

(i) Kidney (target tissue). 0.25 parts per million (ppm).

(ii)Liver. 3 ppm.

(iii) Muscle. 2 ppm.

(3) Cattle. The tolerances for desfuroylceftiofur (marker residue) are:

(i) Kidney (target tissue). 0.4 ppm.

(ii) Liver. 2 ppm.

(iii)Muscle. 1 ppm.

(iv) Milk. 0.1 ppm.

[63 FR 53579, Oct. 6, 1998, as amended at 68 FR 60296, Oct. 22, 2003; 69 FR 43892, July 23, 2004; 71 FR 39546, July 13, 2006]



For questions or comments regarding e-CFR editorial content, features, or design, email ecfr@nara.gov.
For questions concerning e-CFR programming and delivery issues, email webteam@gpo.gov.