27 C.F.R. § 20.113 Proprietary solvents general-use formula.
Title 27 - Alcohol, Tobacco Products and Firearms
(a) A proprietary solvent is any article made with any other ingredients combined with the ingredients in the minimum ratios prescribed in this section. A proprietary solvent shall be made with S.D.A. Formula No. 1 or 3–A containing, for every 100 parts (by volume) of alcohol: (1) No less than 1 part (by volume) of one or any combination of the following: gasoline, unleaded gasoline, heptane, or rubber hydrocarbon solvent, and (2) No less than 3 parts (by volume) of one or any combination of the following: ethyl acetate (equivalent to 85% ester content, as defined in §21.106 of this chapter), methyl isobutyl ketone, methyl n-butyl ketone, tert-butyl alcohol, sec-butyl alcohol, nitropropane (mixed isomers), ethylene glycol monoethyl ether, or toluene. (b) If this article contains more than 4% by weight of methyl alcohol, the label shall have a skull and crossed bones symbol and the following words: “danger,” “poison,” “vapor harmful,” “May be fatal or cause blindness if swallowed,” and “Cannot be made nonpoisonous.”
Title 27: Alcohol, Tobacco and Firearms
PART 20—DISTRIBUTION AND USE OF DENATURED ALCOHOL AND RUM
Subpart F—Formulas and Statements of Process
General-Use Formulas
§ 20.113 Proprietary solvents general-use formula.
