Bromocresol Green Indicator is supplied by Micromaster. It is available in the form of a green coloured solution which is clear without any particles. At pH 3.8, the indicator turns yellow and at pH 5.4, the indicator is blue-green. This product should be stored between 10-30C in a tightly closed container.

Quantity provided: 100 ml/bottle

Bromocresol green (BCG) indicator is used as a pH indicator in applications such as growth mediums for microorganisms and titrations. Bromocresol green (BCG) is a dye of the triphenylmethane family (triarylmethane dyes). The compound is synthesized by bromination of cresol purple (m-cresolsulfonphthalein). In aqueous solution, Bromocresol green will ionize to give the monoanionic form (yellow), that further deprotonates at higher pH to give the dianionic form (blue), which is stabilized by resonance. The Dissociation constant (pKa) of this reaction is 4.8. It becomes yellow at acidic pH level (pH 3.8) and Blue green at from pH 5.4.