[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: 27CFR21.117] [Page 552] 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. 21.117 Methyl isobutyl ketone. (a) Acidity (as acetic acid). 0.02 percent by weight, maximum. (b) Color. Colorless. (c) Distillation range. (For applicable ASTM method, see 1980 Annual Book of ASTM Standards, Part 29, page 147, Standard No. D 1153-77; for incorporation by reference, see Sec. 21.6(b).) No distillate should come over below 111 [deg]C. and none above 117 [deg]C. (d) Odor. Characteristic odor. (e) Specific gravity at 20 [deg]/20 [deg]C. 0.799 to 0.804. [T.D. ATF-133, 48 FR 24673, June 2, 1983. Redesignated by T.D. ATF-442, 66 FR 12854, Mar. 1, 2001]