21 C.F.R. § 556.690 Sulfathiazole.
Title 21 - Food and Drugs
A tolerance of 0.1 part per million is established for negligible residues of sulfathiazole in the uncooked edible tissues of swine.
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
§ 556.690 Sulfathiazole.