COA Center



o-CRESOLPHTHALEIN Indicator grade


5 g (00005)

25 g (00025)

500 g (00500)

1GBA000015 1PW1200060 1PW1201000
Article No. 03010 Grade Indicator grade
Purity CAS No. 596-27-0
Molecular Formula C22H18O4 Molecular Weight 346.39
H.S. Code 2932.2090 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Solid Colour Light brown
Melting point/ Freezing point [°C] 219 - 221 °C


Appearance White to light yellow and faint beige to light beige and faint brown to light brown powder pH 8.2-9.8 Colourless to violet red
Absorption maxima in 0.1 N NaOH 565 - 569 nm Specific absorptivity A1%/1cm (at λmax) Min 1500
Insoluble matter in ethanol Passes test Loss on drying (at 135°C) Max 0.5%
Sulphated ash Max 0.5%
Revision Date: 03-Mar-2021

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