§ 556.495 - Oxfendazole.

§ 556.495 Oxfendazole.

Cattle: A tolerance is established for total oxfendazole residues in edible cattle tissues based on a marker residue concentration of 0.8 part per million (ppm) fenbendazole in the target liver tissue. A fenbendazole concentration of 0.8 ppm in liver corresponds to a total safe concentration of oxfendazole residues of 1.7 ppm in liver. The safe concentrations of total oxfendazole residues in other uncooked edible cattle tissues are: muscle, 0.84 ppm; kidney, 2.5 ppm; and fat, 3.3 ppm. A tolerance refers to the concentration of marker residue in the target tissue selected to monitor for total drug residue in the target animal. A safe concentration is the total residue considered safe in edible tissue.

[55 FR 46943, Nov. 8, 1990]

(a) Acceptable daily intake (ADI). The ADI for total residue of oxfendazole is 7 µg/kg of body weight per day.

(b) Tolerances. The tolerance for fenbendazole (marker residue) is:

(1) Cattle. Liver (target tissue): 0.8 ppm.

(2) [Reserved]

(c) Related conditions of use. See §§ 520.1629 and 520.1630 of this chapter.