27 CFR §21.92
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Denaturing materials and products listed in this part as “U.S.P.” or “N.F.” shall meet the specifications set forth in the current United States Pharmacopoeia or National Formulary, or the latest volume of these publications in which the denaturants appeared as official preparations.