$21.38 Formula No. 4.

(a) Formula. To every 100 gallons of alcohol, or to every 100 gallons of rum of not less than 150 proof, add:

One gallon of the following solution: Five gallons of an aqueous solution containing 40 percent nicotine; 3.6 avoirdupois ounces of methylene blue, U.S.P.; and water sufficient to make 100 gallons.

(b) Authorized uses. (1) As a solvent:

460. Tobacco sprays and flavors.

(2) Miscellaneous uses:

812. Product development and pilot plant uses (own use only).

022. Non-cellulose plastics, including resins. 036. Adhesives and binders.

$21.56 Formula No. 29.

(a) Formula. To every 100 gallons of alcohol add:

One gallon of 100 percent acetaldehyde or 5 gallons of an alcohol solution of acetaldehyde containing not less than 20 percent acetaldehyde, or 1 gallon of ethyl acetate having an ester content of 100 percent, or, where approved by the appropriate ATF officer, as to material and quantity, not less than 6.8 pounds if solid, or 1 gallon if liquid, of any chemical. When material other than acetaldehyde or ethyl acetate is proposed to be used, the user shall submit an application for such use to the appropriate ATF officer. The application shall include specifications, assay methods, and an 8-ounce sample of the substitute material for analysis.

(b) Authorized uses. (1) As a raw material:

031. Photographic film and emulsions.

042.

Adhesives and binders.

Solvents and thinners (other than proprietary solvents or special industrial solvents).