CFR › Title 27 › Part 21 › §21.3827 CFR §21.38Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Formula. To every 100 gallons of alcohol, or to every 100 gallons of rum of not less than 150 proof, add:(b)Authorized uses.(1)As a solvent:(2)Miscellaneous uses: