21 CFR § 556.283 - Florfenicol.

(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.