CFR › Title 21 › Part 556 › §556.11521 CFR §556.115Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(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.