27 C.F.R. § 21.60 Formula No. 33.
Title 27 - Alcohol, Tobacco Products and Firearms
(a) Formula. To every 100 gallons of alcohol add:
Thirty pounds of gentian violet or gentian violet, U.S.P. (b) Authorized uses. (1) As a solvent:
052. Inks (not including meat branding inks). 210. External pharmaceuticals, not U.S.P. or N.F. 249. Miscellaneous external pharmaceuticals, U.S.P. or N.F. (2) Miscellaneous uses:
812. Product development and pilot plant uses (own use only). (c) Conditions governing use. Meat branding inks made with Formula No. 33 do not meet U.S. Department of Agriculture meat inspection specifications for use in Federally inspected establishments. Specially denatured alcohol Formulas No. 3–A, 3–C, and 23–A are authorized for this purpose.
Title 27: Alcohol, Tobacco and Firearms
PART 21—FORMULAS FOR DENATURED ALCOHOL AND RUM
Subpart D—Specially Denatured Spirits Formulas and Authorized Uses
§ 21.60 Formula No. 33.
