27 C.F.R. § 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.
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(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.