27 C.F.R. § 21.133 Vinegar.
Title 27 - Alcohol, Tobacco Products and Firearms
(a) Vinegar, 90-grain: Acidity (as acetic acid). 9.0 percent by weight, minimum. (b) Vinegar, 60-grain: Acidity (as acetic acid). 6.0 percent by weight, minimum. [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
§ 21.133 Vinegar.