(a) Acceptable daily intake (ADI). The ADI for total residue of fenbendazole is 40 µg/kg of body weight per day.
(b) Tolerances. The tolerances for fenbendazole are:
(1) Cattle.
(i) Liver (target tissue): 0.8 ppm fenbendazole (marker residue).
(ii) Muscle: 0.4 ppm fenbendazole.
(iii) Milk: 0.6 ppm fenbendazole sulfoxide.
(2) Chickens.
(i) Liver (target tissue): 5.2 ppm fenbendazole sulfone (marker residue).
(ii) Eggs: 1.8 ppm fenbendazole sulfone (marker residue).
(3) Goats.
(i) Liver (target tissue): 0.8 ppm fenbendazole (marker residue).
(ii) Muscle: 0.4 ppm fenbendazole.
(4) Swine.
(i) Liver (target tissue): 3.2 ppm fenbendazole (marker residue).
(ii) Muscle: 2 ppm fenbendazole.
(5) Turkeys.
(i) Liver (target tissue): 6 ppm fenbendazole sulfone (marker residue).
(ii) Muscle: 2 ppm fenbendazole sulfone.
(c) Related conditions of use. See §§520.905a, 520.905c, 520.905d, 520.905e, and 558.258 of this chapter.