o-CRESOLPHTHALEIN COMPLEXONE excellent quality manufacturer, exporter and supplier. o-CRESOLPHTHALEIN COMPLEXONE is indicator for complexometric titration of Mg, Ca, Sr and Ba. It is used as an alkaline earth metal ion indicator. It is suggested to be colorless at pH 11, but turns pink in the presence of alkaline earth metals and also utilized in an auto analyzer to determine serum calcium.

Technical Specifications:
C.A.S. No. 2411-89-4
M.F. C32H32N2 O12
M.W. 636.62gm/mole


Solubility 0.1% (0.1N NaOH) Clear solution
Absorption maximum (0.1N NaOH) at ?max 572-578nm
Absorptivity (A1%1cm in 0.1N NaOH, at ?max on dried substance) >790
Loss On Drying (110°C) <6%

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