Azo violet
Compounds
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Azo violet is an azo compound with the chemical formula C₁₂H₉N₃O₄. It is used commercially as a violet dye and experimentally as a pH indicator, appearing yellow below pH 11, and violet above pH 13. It also turns deep blue in the presence of... Wikipedia
Formula: C12H9N3O4
Molar mass: 366.71 g/mol
Solubility in water: 1 g/L H2O; 4 g/L Ethanol
Appearance: dark red to brown crystalline powder
Density: 1.45 g/cm3
Flash point: 261.7 °C (503.1 °F; 534.8 K)