Lithium Tert-Butoxide 20% in Tetrahydrofuran LiOtBu in THF CAS No. 1907-33-1 EC: 217-611-5 CAS No. 109-99-9 This is used for industrial use. This is a flammable liquid that is colourless to amber.

General Interpretive Rules 1 & 6 Notes to Section VI and Chapter 29 HSEN to Chapter 29 and Heading 2905 Text to codes 2905, 2905 19, 2905 19 00, 2905 19 00 98 Laboratory Advice R22A0029