[Code of Federal Regulations] [Title 27, Volume 1] [Revised as of January 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 27CFR21.44] [Page 540] TITLE 27--ALCOHOL, TOBACCO PRODUCTS AND FIREARMS CHAPTER I--ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY PART 21_FORMULAS FOR DENATURED ALCOHOL AND RUM--Table of Contents Subpart D_Specially Denatured Spirits Formulas and Authorized Uses Sec. 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).