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.