Description Alizarin Violet, 98+%, 25g For Research & Development Not for drug, human, animal, or food use Certificate of Analysis: Appearance (Color) Black Appearance (Form) Powder Purity (HPLC) 98+% Lambda max. 532.0 to 535.0 nm (pH 6.8 buffer sol.) Absorbance (E1%1cm) min. 360 (pH 6.8 buffer sol., 532.0 to 535.0 nm) CAS: 2103-64-2 FORMULA: C20H12O7