Formula: C₂₈H₁₈O₄ CAS: 596-01-0 EC No.: 209-882-1 M (Molar Mass): 418.44 g/mol D (Density): ~1.0 g/cm³ (approx.) mp (Melting Point): 252-254 °C bp (Boiling Point): Not applicable pH Range: 7.3 (pink-red) - 8.7 (green-blue)

Assay (Colorimetric): Suitable for use as pH indicator. Appearance: White to pinkish powder. Identification (Color Change): Passes test (colorless in acid, pink-red in weak base, green-blue in strong base). Solubility (in Ethanol): Passes test. Loss on Drying: ≤ 0.5 % Sensitivity Test (pH transition): Complies.