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CFR > Title 21 - Food and Drugs > CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER E—ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS (parts 500 to 590) > PART 556—TOLERANCES FOR RESIDUES OF NEW ANIMAL DRUGS IN FOOD > SUBPART B—Specific Tolerances for Residues of New Animal Drugs (§556.34 to §556.770) > 556.660—Sulfamerazine.
556.660—Sulfamerazine.
A tolerance of zero is established for residues of sulfamerazine (N 1 -[4-methyl-2-pyrimidinyl]sulfanilamide) in the uncooked edible tissues of trout.