StacksVerified U.S. regulatory reference

21 CFR §556.316

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)[Reserved]
  2. (b)Tolerances. The tolerances for ampicillin (marker residue for hetacillin) are:
    1. (1)Cattle. Edible tissues: 0.01 ppm.
    2. (2)[Reserved]
  3. (c)Related conditions of use. See § 526.1130 of this chapter.