21 C.F.R. § 556.100 Carbadox.
Title 21 - Food and Drugs
A tolerance of 30 parts per billion is established for residues of quinoxaline-2-carboxylic acid (marker residue) in liver (target tissue) of swine. [63 FR 13337, Mar. 19, 1998]
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
§ 556.100 Carbadox.
