| Synonyms: |
- 3',3'',5',5''-tetrabromophenolsulfonephthalein
- 3',3'',5',5''-tetrabromophenolsulfophthalein
- 4,4'-(1,1-dioxido-3H-2,1-benzoxathiole-3,3-diyl)bis(2,6-dibromophenol)
- bromophenol blue, sultone form
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| Definition: |
3H-2,1-Benzoxathiole 1,1-dioxide in which both of the hydrogens at position 3 have been substituted by 3,5-dibromo-4-hydroxyphenyl groups. It is used as a laboratory indicator, changing from yellow below pH 3 to purple at pH 4.6, and as a size marker for monitoring the progress of agarose gel and polyacrylamide gel electrophoresis. It has also been used as an industrial dye.
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