Description Tropaeolin OOO, No. 1, for Microscopy, Indicator (pH 7.6-8.9), 25g For Research & Development Not for drug, human, animal, or food use Certificate of Analysis: Appearance (Color) Dark red Appearance (Form) Powder Infrared Spectrum Conforms to structure CAS: 523-44-4 FORMULA: C16H11N2NaO4S