Products / pH Indicators

CRESOL RED (ACS GRADE) Print Download

C.A.S. No. 1733-12-6
M.F. C21H18O5S
M.W. 382.43gm/mole

Specifications:

Dye Content (by Spectrophotometry) >95%
Transition Range pH 6.5-8.8
Yellow-Purple
Solubility 0.1% (95% EtOH) Clear solution
Absorption maximum (pH 6.5) ?1max 432-436nm
Absorption maximum (pH 8.8) ?2max 571-574nm
Absorptivity (A1%/1cm at pH 6.5 at ?1max) 490-540
Absorptivity (A1%/1cm at pH 8.8 at ?2max) 1000-1100
Loss On Drying (110°C) <3%
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