NILE CHEMICALS

BROMO CRESOL PURPLE

SPECIFICATION SHEET

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