CFR›Title 21›Chapter I›Part 589›Subpart A ContainsSection 589.1CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Subpart A—General Provisions Sections 589.1 § 589.1 Substances prohibited from use in animal food or feed. Next B Subpart B—Listing of Specific Substances Prohibited From Use in Animal Food or Feed