Bromocresol purple
Chemical compound
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Bromocresol purple or 5′,5″-dibromo-o-cresolsulfophthalein, is a dye of the triphenylmethane family and a pH indicator. It is colored yellow below pH 5.2, and violet above pH 6.8. In its cyclic sulfonate ester form, it has a pKₐ value of 6.3, and... Wikipedia
Formula: C21H16Br2O5S
Molar mass: 540.22 g/mol
Solubility in water: < 0.1 %
3D model (JSmol): Interactive image
Melting point: 241 to 242 °C (466 to 468 °F; 514 to 515 K) (decomposition)
NFPA 704 (fire diamond): 1 0 0