27 CFR 21.22 - Formula No. 18.
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§ 21.22 Formula No. 18.
2.50 gallons of either methyl isobutyl ketone, mixed isomers of nitropropane, or methyl n- butyl ketone;
0.125 gallon of pyronate or a similar compound;
0.50 gallon acetaldol (beta-hydroxybutyraldehyde); and
1.00 gallon of either kerosene, deodorized kerosene, gasoline, unleaded gasoline, rubber hydrocarbon solvent, or heptane.