Section 556.275 - Fenbendazole(a)Acceptable daily intake (ADI). The ADI for total residue of fenbendazole is 40 [MICRO]g/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) Milk: 0.22 ppm fenbendazole sulfoxide (marker residue).(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).(4)Swine.(i) Liver (target tissue): 3.2 ppm fenbendazole (marker residue).(5)Turkeys.(i) Liver (target tissue): 6 ppm fenbendazole sulfone (marker residue).(c)Related conditions of use. See §§ 520.905a , 520.905b , 520.905c , 520.905d , and 558.258 of this chapter.84 FR 32993, July 11, 2019, as amended at 86 FR 57998, Oct. 20, 2021; 86 FR 61686, Nov. 8, 2021 81 FR 22524, 4/18/2016; 83 FR 48947, 9/28/2018; 84 FR 32993, 9/9/2019; as amended at 86 FR 57998, 10/20/2021; 86 FR 61686, 11/8/2021