[Code of Federal Regulations] [Title 27, Volume 1] [Revised as of April 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 27CFR21.21] [Page 470-471] TITLE 27--ALCOHOL, TOBACCO PRODUCTS AND FIREARMS CHAPTER I--BUREAU OF ALCOHOL, TOBACCO AND FIREARMS, DEPARTMENT OF THE TREASURY PART 21--FORMULAS FOR DENATURED ALCOHOL AND RUM--Table of Contents Subpart C--Completely Denatured Alcohol Formulas Sec. 21.21 General. (a) Alcohol shall be completely denatured only in accordance with formulas prescribed in this subpart (or in accordance with Sec. 21.5). (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 [[Page 471]] 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.