27 CFR § 5.91 - Use of the term “pure.”

Distilled spirits labels, containers, or packaging may not bear the word “pure” unless it:

(a) Refers to a particular ingredient used in the production of the distilled spirits, and is a truthful representation about that ingredient;

(b) Is part of the bona fide name of a permittee or retailer for which the distilled spirits are bottled; or

(c) Is part of the bona fide name of the permittee that bottled the distilled spirits.