GroundRules
21 CFR 556.283: Florfenicol.
Where this section sits in the code
- 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
- PART 556—TOLERANCES FOR RESIDUES OF NEW ANIMAL DRUGS IN FOOD
- Subpart B—Specific Tolerances for Residues of Approved and Conditionally Approved New Animal Drugs
(a) Acceptable daily intake (ADI). The ADI for total residue of florfenicol is 10 µg/kg of body weight per day.
(b) Tolerances. The tolerances for florfenicol amine (marker residue) are:
(1) Cattle. (i) Liver (target tissue): 3.7 ppm.
(ii) Muscle: 0.3 ppm.
(2) Swine. (i) Liver (target tissue): 2.5 ppm.
(ii) Muscle: 0.2 ppm.
(3) Catfish. Muscle (target tissue): 1 ppm.
(4) Freshwater-reared warmwater finfish (other than catfish) and salmonids. Muscle/skin (target tissue): 1 ppm.
(c) Related conditions of use. See §§ 520.955, 522.955, 522.956, and 558.261 of this chapter.
Collected 2026-08-27T02:24:47Z. Source file · JSON