Eastman BioSustane™ SAIB, pharma grade (sucrose acetate isobutyrate) is a high viscosity liquid depot for extended drug delivery in enteral, parenteral, and topical applications. It is an odorless, colorless, viscous liquid produced by the controlled esterification of natural sugar (sucrose) with acetic and isobutyric anhydrides and highly purified by distillation.