21 C.F.R. § 556.316
Hetacillin
(a) [Reserved]
(b) Tolerances. The tolerances for ampicillin (marker residue for hetacillin) are:
(1) Cattle. Edible tissues: 0.01 ppm.
(2) [Reserved]
(c) Related conditions of use. See § 526.1130 of this chapter.
(a) [Reserved]
(b) Tolerances. The tolerances for ampicillin (marker residue for hetacillin) are:
(1) Cattle. Edible tissues: 0.01 ppm.
(2) [Reserved]
(c) Related conditions of use. See § 526.1130 of this chapter.