27 C.F.R. § 21.118 Methyl n -butyl ketone.
Title 27 - Alcohol, Tobacco Products and Firearms
(a) Acidity (as acetic acid). 0.02 percent by weight, maximum. (b) Color. Colorless. (c) Odor. Characteristic odor. (d) Refractive index at 20 °C. 1.396 to 1.404. (e) Specific gravity at 20 °/20 °C. 0.800 to 0.835. (f) Distillation range. No distillate should come over below 123 °C. and none above 129 °C. [T.D. ATF–133, 48 FR 24673, June 2, 1983. Redesignated by T.D. ATF–442, 66 FR 12854, Mar. 1, 2001]
Title 27: Alcohol, Tobacco and Firearms
PART 21—FORMULAS FOR DENATURED ALCOHOL AND RUM
Subpart E—Specifications for Denaturants
§ 21.118 Methyl