Home

27 CFR PART 21 - FORMULAS FOR DENATURED ALCOHOL AND RUM

Subpart C - Completely Denatured Alcohol [CDA] Formulas

§21.21 General.
(a) Alcohol shall be completely denatured only in accordance with formulas prescribed in this subpart (or in accordance with §21.5 [for export]).
(b) Denaturers may be authorized to add a small quantity of an odorant, rust inhibitor, or dye to completely denatured alcohol. Any such addition shall be made only on approval by the appropriate ATF officer. Request for such approval shall be submitted to the appropriate ATF officer.
(c) Odorants or perfume materials may be added to denaturants authorized for completely denatured alcohol in amounts not greater than 1 part to 250, by weight. However, such addition shall not decrease the denaturing value nor change the chemical or physical constants beyond the limits of the specifications for these denaturants as prescribed in subpart E, except as to odor. Proprietors of distilled spirits plants using denaturants to which such odorants or perfume materials have been added shall inform the appropriate ATF officer, in writing, of the names and properties of the odorants or perfume materials so used.

§21.22 Formula No. 18.
To every 100 gallons of ethyl alcohol of not less than 160 proof add:
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.

§21.23 Formula No. 19.  [Probably the most common denatured alcohol sold at retail.]
To every 100 gallons of ethyl alcohol of not less than 160 proof add:
4.0 gallons of either methyl isobutyl ketone, mixed isomers of nitropropane, or methyl n- butyl ketone; and
1.0 gallon of either kerosene, deodorized kerosene, gasoline, unleaded gasoline, rubber hydrocarbon solvent, or heptane.

§21.24 Formula No. 20.
(a) Formula. To every 100 gallons of ethyl alcohol of not less than 195 proof add:
A total of 2.0 gallons of either unleaded gasoline, rubber hydrocarbon solvent, kerosene, or deodorized kerosene; or any combination of these.
(b) Authorized use. Restricted to fuel use, comparable to specially denatured alcohol "Use Code No." 611, 612, 613, 620, and 630.

Last 10-20-10