Product : O- Cresolphthalein Complexone
C.A.S. No. :2411-89-4
M.F. :C32H32N2 O12
M.W. :636.62gm/mole

Specifications:
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%

Product Description:

o-Cresolphthalein Complexone is complexometric reagent derived from o-Cresolphthalein. It shows violet-red color in alkaline media and is a principle compound for the determination of hardness of water.Also used as Calcium Assay Kit as direct colorimetric assay based on the O-Cresolphtalein (OCPC) method without deproteinization of the sample. The calcium determination is based on the reaction of calcium with O-Cresolphthalein complexone in alkaline solution, which yields a violet colored complex. The intensity of the color formed is proportional to the calcium concentration in the sample. Absorbance of the Ca2+-O-Cresolphtalein complex is measured at 570nm. Wavelength range of sensitivity: 560 ~ 590nm.