CFR › Title 21 › Part 556 › §556.62521 CFR §556.625Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)[Reserved](b)Tolerances. The tolerance for sulfachloropyrazine is:(1)Chickens. Edible tissues (excluding eggs): Zero.(2)[Reserved](c)Related conditions of use. See § 520.2184 of this chapter.