Editorial Note on Part 21
Editorial Notes: Nomenclature changes to part 21 appear by T.D. ATF-435, 66 FR 5475, Jan. 19, 2001. Nomenclature changes to part 21 appear by 81 T.D. TTB-140, 81 FR Aug. 30, 2016.

§ 21.32 Formula No. 1. ( a ) *Formula.* To every 100 gallons of alcohol add: Four gallons of methyl alcohol and either
1 ⁄ 8 avoirdupois ounce of denatonium benzoate, N.F.; 1 gallon of methyl isobutyl ketone; 1 gallon of mixed isomers of nitropropane; or 1 gallon of methyl *n-* butyl ketone.
( b ) *Authorized uses.* ( 1 ) As a solvent: 011. Cellulose coatings. 012. Synthetic resin coatings. 013. Shellac coatings. 014. Other natural resin coatings. 016. Other coatings. 021. Cellulose plastics. 022. Non-cellulose plastics, including resins. 031. Photographic film and emulsions. 032. Transparent sheeting. 033. Explosives. 034. Cellulose intermediates and industrial collodions. 035. Soldering flux. 036. Adhesives and binders. 041. Proprietary solvents. 042. Solvents and thinners (other than proprietary solvents or special industrial solvents). 043. Solvents, special (restricted sale). 051. Polishes. 052. Inks (not including meat branding inks). 053. Stains (wood, etc.). 141. Shampoos. 142. Soap and bath preparations. 311. Cellulose compounds (dehydration). 312. Sodium hydrosulfite (dehydration). 315. Other dehydration products. 320. Petroleum products. 331. Processing pectin. 332. Processing other food products. 341. Processing crude drugs. 342. Processing glandular products, vitamins, hormones, and yeasts. 343. Processing antibiotics and vaccines. 344. Processing medicinal chemicals (including alkaloids). 345. Processing blood and blood products. 349. Miscellaneous drug processing (including manufacture of pills). 351. Processing dyes and intermediates. 352. Processing perfume materials and fixatives. 353. Processing photographic chemicals. 354. Processing rosin. 355. Processing rubber (latex). 358. Processing other chemicals. 359. Processing miscellaneous products. 410. Disinfectants, insecticides, fungicides, and other biocides. 420. Embalming fluids and related products. 430. Sterilizing and preserving solutions. 440. Industrial detergents and soaps. 450. Cleaning solutions (including household detergents). 481. Photoengraving and rotogravure dyes and solutions. 482. Other dye solutions. 485. Miscellaneous solutions (including duplicating fluids).
( 2 ) As a raw material: 521. Ethyl acetate. 522. Ethyl chloride. 523. Other ethyl esters. 530. Ethylamines. 540. Dyes and intermediates. 551. Acetaldehyde. 552. Other aldehydes. 561. Ethyl ether. 562. Other ethers. 571. Ethylene dibromide. 572. Ethylene gas. 573. Xanthates. 574. Fulminate of mercury and other detonators. 575. Drugs and medicinal chemicals. 579. Other chemicals.
( 3 ) As a fuel: 611. Automobile and supplementary fuels. 612. Airplane and supplementary fuels. 613. Rocket and jet fuels. 620. Proprietary heating fuels. 630. Other fuel uses.
( 4 ) As a fluid: 710. Scientific instruments. 720. Brake fluids. 730. Cutting oil. 740. Refrigerating uses. 750. Other fluid uses. 760. Proprietary anti-freeze.
( 5 ) Miscellaneous uses:
812. Product development and pilot plant uses (own use only). 900. Specialized uses (unclassified).
[T.D. ATF-133, 48 FR 24673, June 2, 1983, as amended by T.D. ATF-199, 50 FR 9183, Mar. 6, 1985; T.D. ATF-442, 66 FR 12854, Mar. 1, 2001]