CFR › Title 21 › Part 582 › §582.680721 CFR §582.6807Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Product. Sodium thiosulfate.(b)Tolerance. 0.1 percent.(c)Limitations, restrictions, or explanation. This substance is generally recognized as safe when used in salt in accordance with good manufacturing or feeding practice.