Description Phthalic Anhydride, Reagent, 99.7+%, 100g For Research & Development Not for drug, human, animal, or food use Specifications: Appearance (Color) White Appearance (Form) Flake/Crystalline powder Assay 99.7+%Color Molten, APHA <20Color Stability, APHA (2 hr. @ 250 °C) <50Freezing Point 130.9 °C min.Naphthoquinone <0.25 ppmPhthalic Acid <0.2% CAS: 85-44-9 FORMULA: C8H4O3