Rev. Rul. 58-594

Section 212.37 of the Regulations relating to Formulas for Denatured Alcohol prescribes the addition of 100 pounds of medicinal soft soap, U.S.P., and one gallon of lavender oil, U.S.P., to every 100 gallons of alcohol in specially denatured alcohol Formula No. 27-B.U.S.P. Soft Soap (about 50 percent soap and 50 percent water) is very viscous and hard to handle, but if the ratio is changed to effect a larger percentage of soap and a lesser percentage of water during the initial stages of mixing it becomes less viscous and dissolves more freely in the alcohol. Held, the requirements of the regulations may be met in the formulation of specially denatured alcohol Formula No. 27-B by adding one gallon of Lavender Oil, U.S.P., and 66.5 pounds of U.S.P. quality soap concentrate containing 25 percent water to 100 gallons of ethyl alcohol and, after mixing, by adding thereto 33.5 pounds of water and again mixing.