21 CFR 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 -

(i)Liver (the target tissue). 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)Freshwater-reared finfish (other than catfish) and salmonids. The tolerance for florfenicol amine (the marker residue) in muscle/skin (the target tissues) is 1 ppm.

(4)Catfish. The tolerance for florfenicol amine (the marker residue) in muscle (the target tissues) is 1 ppm.

(c)Related conditions of use. See §§ 520.955, 522.955, 522.956, and 558.261 of this chapter.

[ 76 FR 16291, Mar. 23, 2011, as amended at 81 FR 17608, Mar. 30, 2016]

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United States Code

Title 21 published on 10-May-2017 03:43

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 21 CFR Part 556 after this date.

  • 2016-12-27; vol. 81 # 248 - Tuesday, December 27, 2016
    1. 81 FR 94991 - New Animal Drugs for Use in Animal Feed; Approval of New Animal Drug Applications; Withdrawal of Approval of New Animal Drug Applications
      GPO FDSys XML | Text
      DEPARTMENT OF HEALTH AND HUMAN SERVICES, Food and Drug Administration
      Final rule; technical amendment.
      This rule is effective December 30, 2016.
      21 CFR Parts 556 and 558