CFR › Title 21 › Part 582 › §582.384521 CFR §582.3845Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Product. Stannous chloride.(b)Tolerance. This substance is generally recognized as safe for use at a level not exceeding 0.0015 percent calculated as tin in accordance with good manufacturing or feeding practice.