Description Acetic Anhydride, ACS, 97+%, 100ml For Research & Development Not for drug, human, animal, or food use Specifications: Assay 97+% Residue after evaporation <0.003% Chloride <0.0005% Phosphate <0.001% Sulfate <0.0005% Heavy Metals (as Pb) <0.0002% Iron <0.0005% Substances Reducing Permanganate Pass Test CAS: 108-24-7 FORMULA: (CH3CO)2O