21 CFR § 556.765 - Zilpaterol.

(a) Acceptable daily intake (ADI). The ADI for total residue of zilpaterol is 0.083 µg/kg of body weight per day.

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

(1) Cattle.

(i) Liver (target tissue): 12 ppb.

(ii) Muscle: 10 ppb.

(2) [Reserved]

(c) Related conditions of use. See § 558.665 of this chapter.

[84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020]