StacksVerified U.S. regulatory reference

21 CFR §556.420

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Acceptable daily intake (ADI). The ADI for total residue of monensin is 12.5 µg/kg of body weight per day.
  2. (b)Tolerances. The tolerances for monensin are:
    1. (1)Cattle.
      1. (i)Liver: 0.10 ppm.
      2. (ii)Muscle, kidney, and fat: 0.05 ppm.
      3. (iii)Milk: Not required.
    2. (2)Chickens and turkeys. Edible tissues (excluding eggs): Not required.
    3. (3)Goats. Edible tissues (excluding milk): 0.05 ppm.
    4. (4)Quail. Edible tissues (excluding eggs): Not required.
  3. (c)Related conditions of use. See § 558.355 of this chapter.