21 CFR § 556.115
Cephapirin
June 25, 2020
(a) [Reserved]
(b) Tolerances. The tolerances for cephapirin are:
(1) Cattle.
(i) Edible tissues (excluding milk): 0.1 ppm.
(ii) Milk: 0.02 ppm.
(2) [Reserved]
(c) Related conditions of use. See §§526.363 and 526.365 of this chapter.