O-CRESOLPHTHALEIN (pH INDICATOR)*

O-CRESOLPHTHALEIN (pH INDICATOR)
Article No. Grade Purity Cas no. Molecular Formula Molecular Weight H.S. Code Shelf Life
C0079200005 pH Indicator 596-27-0 C22H18O4 346.39 2934.9900
60 Months

Physical Properties

Physical state at 20 °C

Solid

Colour

Light brown

Melting Point/ Freezing point [°C]

219 - 221 °C

Specifications

Appearance:

 Light brown powder

Sulphated ash:

 Max 0.5%

Loss on dryig (at 135°C):

 Max 0.5%

Absorption maxima at pH 11.3:

 565 - 569 nm

pH 8.2-9.8:

 Colourless to violet red

Specific absorptivity A1%/1cm (at lmax):

 Min 1500

Insoluble matter in ethanol:

 Passes test
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Globally Harmonized System of classification and Labelling of Chemicals (GHS)

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