27 CFR § 21.44 - Formula No. 19.

(a) Formula. To every 100 gallons of alcohol add:

One hundred gallons of ethyl ether.

(b) Authorized uses.

(1) As a solvent:

031. Photographic film and emulsions.

034. Cellulose intermediates and industrial collodions.

241. Collodion, U.S.P.

(2) Miscellaneous uses:

812. Product development and pilot plant uses (own use only).