Proprietary solvents general-use formula.

§ 20.113 Proprietary solvents general-use formula. A proprietary solvent made pursuant to this formula shall be made with alcohol denatured in accordance with S.D.A. Formula No. 1, 3–A, or 3–C and shall contain, for every 100 parts (by volume) of S.D.A.: (a) No less than 1 part (by volume) of one or any combination of the following: Gasoline, unleaded gasoline, heptane, or rubber hydrocarbon solvent, and (b) No less than 3 parts (by volume) of one or any combination of the following: Ethyl acetate (equivalent to 85 percent ester content, as defined in § 21.107 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. [T.D. TTB–140, 81 FR 59457, Aug. 30, 2016]