[Code of Federal Regulations]
[Title 21, Volume 6]
[Revised as of January 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR556.308]

[Page 347]
 
                        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 Contents
 
     Subpart B--Specific Tolerances for Residues of New Animal Drugs
 
Sec.  556.308  Halofuginone hydrobromide.

    The marker residue selected to monitor for total residues of 
halofuginone hydrobromide in broilers and turkeys is parent halofuginone 
hydrobromide and the target tissue selected is liver. A tolerance is 
established in broilers of 0.16 part per million and in turkeys of 0.13 
part per million for parent halofuginone hydrobromide in liver. These 
marker residue concentrations in liver correspond to total residue 
concentrations of 0.3 part per million in liver. The safe concentrations 
for total residues of halofuginone hydrobromide in the uncooked edible 
tissues of broilers and turkeys are 0.1 part per million in muscle, 0.3 
part per million in liver, and 0.2 part per million in skin with 
adhering fat. As used in this section, ``tolerance'' refers to a 
concentration of a marker residue in the target tissue selected to 
monitor for total residues of the drug in the target animal, and ``safe 
concentrations'' refers to the concentrations of total residues 
considered safe in edible tissues.

[54 FR 28052, July 5, 1989, as amended at 56 FR 8711, Mar. 1, 1991; 57 
FR 21209, May 19, 1992]