21 C.F.R. § 556.425 – Morantel.

(a) Acceptable daily intake (ADI). The ADI for total residue of morantel tartrate is 10 µg/kg of body weight per day.
(b) Tolerances. The tolerances for N-methyl-1,3-propanediamine (marker residue) are:
1. (1) Cattle.
  1. (i) Liver (target tissue): 0.7 ppm.
  2. (ii) Milk: Not required.
2. (2) Goats.
  1. (i) Liver (target tissue): 0.7 ppm.
  2. (ii) Milk: Not required.
(c) Related conditions of use. See §§ 520.1450a, 520.1450b, 520.1450c, and 558.360 of this chapter.