[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: 27CFR21.133] [Page 556] 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. 21.133 Vinegar. (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]