21 CFR § 556.163
Clorsulon
June 25, 2020
(a) Acceptable daily intake (ADI). The ADI for total residue of clorsulon is 8 µg/kg of body weight per day.
(b) Tolerances. The tolerances for clorsulon (marker residue) are:
(1) Cattle.
(i) Kidney (target tissue): 1.0 ppm.
(ii) Muscle: 0.1 ppm.
(2) [Reserved]
(c) Related conditions of use. See §§520.462 and 522.1193 of this chapter.