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m-Cresol purple, 1 g

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2',2''-Dimethylphenolsulfonphthalein, MCP, m-Cresolsulfonphthalein
Empirical formula C21H18O5S
Molar mass (M) 382,43 g/mol
CAS No. [2303-01-7]
EG-Nr. 218-960-6

Indicator pH 1.2-2.8 and pH 7.4-9.0
Dissolve 0.04 g in 100 ml ethanol (20 %) or 0.04 g in 1.05 ml NaOH 0.1 mol/l and make up to 100 ml with water

€14.55/Pack Qty. 

excl. VAT. | 1 g per Pack Qty.

Art. No. 5160.1

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Product details

m-Cresol purple p.a.

Technical Information
Colour conversion red - yellow 
yellow - purple 
Handling area pH 1,2 - 2,8 
7,4 - 9,0 
m-Cresol purple
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Order No. Pack Qty. Pack. Price Quantity
5160.1 1 g glass


5160.2 5 g glass


5160.3 10 g glass


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Selected quantity:   0
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Downloads / MSDS

General information

Indicators and Dyes

Carl ROTH offers many indicators and dyes of high purity, which can be used in special applications.

Certificates of Analysis

You can search for and download your certificate of analysis for the selected product here. Please provide your batch number.
The following analysis certificates have been found:

Type analysis

Appearancegreen powder
Assay≥90,0 %
pH-transition range7,4 (yellow)-9,0 (purple)
Maximum absorption~579 nm

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