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Bromocresol Green, indicator (pH 3.8-5.4)
CAS Number: 76-60-8
Molecular Formula: C21H14Br4O5S
Molecular Weight: 698.01
IUPAC Name: 2,6-Dibromo-4-[7-(3,5-dibromo-4-hydroxy-2-methyl-phenyl)-9,9-dioxo-8-oxa-9λ6-thiabicyclo[4.3.0]nona-1,3,5-trien-7-yl]-3-methyl-phenol
Other Names: 3,3',5,5'-Tetrabromo-m-cresolsulfonphthalein, Bromcresol Green
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Bromocresol green (BCG) is a dye of the triphenylmethane family (triarylmethane dyes). It is used as a pH indicator in applications such as growth mediums for microorganisms and titrations. It is used as a pH indicator and as a tracking dye for DNA agarose gel electrophoresis.
It can be used in its free acid form (light brown solid), or as a sodium salt (dark green solid). It is also an inhibitor of the prostaglandin E2 transport protein.
