[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: 21CFR556.308]

[Page 356-357]
 
                        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.  556.308  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

[[Page 357]]

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]