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) > 556.283—Florfenicol.

556.283—Florfenicol.

(a) Acceptable daily intake (ADI). The ADI for total residues of florfenicol is 10 micrograms per kilogram of body weight per day.
(b) Tolerances— (1) Cattle— The tolerance for florfenicol amine (the marker residue) is 3.7 parts per million (ppm).
(ii) Muscle. The tolerance for florfenicol amine (the marker residue) is 0.3 ppm.
(2) Swine— (i) Liver (the target tissue). The tolerance for parent florfenicol (the marker residue) is 2.5 ppm.
(ii) Muscle. The tolerance for parent florfenicol (the marker residue) is 0.2 ppm.
(3) Catfish. The tolerance for florfenicol amine (the marker residue) in muscle (the target tissue) is 1 ppm.
(4) Salmonids. The tolerance for florfenicol amine (the marker residue) in muscle/skin (the target tissues) is 1 ppm.
(c) Related conditions of use. See §§ 520.955, 522.955, 522.956, and 558.261 of this chapter.

Code of Federal Regulations

[76 FR 16291, Mar. 23, 2011]