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Bromo Cresol Purple
Specification Sheet
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CAS No.
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115 - 40 - 2
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Chemical Formula
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C21H16Br2O5S
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Molecular Weight
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540.24
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Melting Point
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240 oC
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Dye Content
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~95%
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Transition Range
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pH 5.2 - 6.8
Greenish Yellow to Purple
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Absorption Max(pH5.2)
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427 - 431 nm
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Absorption Max(pH6.8)
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588 - 590 nm
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Absorptivity(1%,1cm)pH 5.2
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400 - 450
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Absorptivity(1%,1cm)pH 6.8
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1000 - 1100
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Loss On Drying
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<1%
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