21 CFR § 556.420
Monensin
June 25, 2020
(a) Acceptable daily intake (ADI). The ADI for total residue of monensin is 12.5 µg/kg of body weight per day.
(b) Tolerances. The tolerances for monensin are:
(1) Cattle.
(i) Liver: 0.10 ppm.
(ii) Muscle, kidney, and fat: 0.05 ppm.
(iii) Milk: Not required.
(2) Chickens and turkeys. Edible tissues (excluding eggs): Not required.
(3) Goats. Edible tissues (excluding milk): 0.05 ppm.
(4) Quail. Edible tissues (excluding eggs): Not required.
(c) Related conditions of use. See §558.355 of this chapter.