CFR › Title 21 › Part 556 › §556.51721 CFR §556.517Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)[Reserved](b)Tolerances. The tolerance for poloxalene is:(1)Cattle. Edible tissues (excluding milk): Not required.(2)[Reserved](c)Related conditions of use. See §§ 520.1840 and 558.464 of this chapter.