[Code of Federal Regulations] [Title 27, Volume 1] [Revised as of January 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 27CFR21.129] [Page 555] TITLE 27--ALCOHOL, TOBACCO PRODUCTS AND FIREARMS CHAPTER I--ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY PART 21_FORMULAS FOR DENATURED ALCOHOL AND RUM--Table of Contents Subpart E_Specifications for Denaturants Sec. 21.129 Spearmint oil, terpeneless. (a) Carvone content. Not less than 85 percent by weight. (b) Refractive index at 20 [deg]C. 1.4930 to 1.4980. (c) Specific gravity at 25 [deg]/25 [deg]C. 0.949 to 0.956. (d) Odor. Characteristic odor. [T.D. ATF-133, 48 FR 24673, June 2, 1983. Redesignated by T.D. ATF-442, 66 FR 12854, Mar. 1, 2001]