27 CFR § 21.50 - Formula No. 25.

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

Twenty pounds of iodine, U.S.P., and 15 pounds of either potassium iodide, U.S.P., or sodium iodide, U.S.P.

(b) Authorized uses.

(1) As a solvent:

230. Tinctures of iodine.

249. Miscellaneous external pharmaceuticals, U.S.P. or N.F.

(2) Miscellaneous uses:

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