Bromo Cresol Green Sodium Salt

Bromocresol Green (BCG) is a dye of the triphenylmethane family (triarylmethane dyes).
Bromocresol green (pH indicator)
below pH 3.8         above pH 5.4
3.8     â†”     5.4

In aqueous solution, both solids ionize to give the monoanionic form (yellow), that further deprotonates at higher pH to give the dianionic form (blue),[

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