Isobutyric anhydride CAS 97-72-3 Specification: Purity (GC) : 99.0% min. Isobutyric acid (GC) : 1.0% max. The Product is a Chemical intermediate for Pharmaceuticals. The product is a colourless transparent liquid and has a pungent odour, packed as 190kg in 200L HDPE drums.

GIR 1 and 6. Notes to Section VI and Chapter 29. HSENs to Chapter 29 and heading 2915. The text to codes 2915, 2915.90, 2915.90.70 and 2915.90.70.90 Applicant's declaration and Laboratory report R20A0326.