[Code of Federal Regulations]
[Title 21, Volume 6]
[Revised as of April 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR556.300]

[Page 356]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES (CONTINUED)
 
PART 556_TOLERANCES FOR RESIDUES OF NEW ANIMAL DRUGS IN FOOD--Table of 
 
     Subpart B_Specific Tolerances for Residues of New Animal Drugs
 
Sec.  556.300  Gentamicin sulfate.

    (a) A tolerance of 0.1 part per million is established for 
negligible residues of gentamicin sulfate in the uncooked edible tissues 
of chickens and turkeys.
    (b) Tolerances are established for total residues of gentamicin in 
edible tissues of swine as follows: 0.1 part per million in muscle, 0.3 
part per million in liver, and 0.4 part per million in fat and kidney. A 
microbiological determinative procedure and an HPLC confirmatory 
procedure for gentamicin have been developed to assay gentamicin in 
kidney at 0.4 ppm. Since residues of gentamicin as the parent compound 
and total residues are equal, the marker (parent drug) residue 
concentration of 0.4 ppm in kidney corresponds to 0.4 ppm of total 
residue.

[48 FR 791, Jan. 7, 1983, as amended at 61 FR 24441, May 15, 1996]