CFR › Title 21 › Part 556 › §556.63021 CFR §556.630Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)[Reserved](b)Tolerances. The tolerances for sulfachlorpyridazine are:(1)Cattle and swine. Edible tissues (excluding milk): 0.1 ppm.(2)[Reserved](c)Related conditions of use. See §§ 520.2200 and 522.2200 of this chapter.