World Of Science Bromocresol purple 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 pK₠value of 6.3, and is usually prepared as a 0.04% aqueous solution.Chemical formula‎: ‎C21H16Br2O5S
Bromocresol Purple AR 25g
R566.57
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