Date published: 2026-5-1

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m-Cresol Purple (CAS 2303-01-7)

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Alternate Names:
m-Cresolsulfonphthalein
Application:
m-Cresol Purple is a pH indicator dye
CAS Number:
2303-01-7
Molecular Weight:
382.43
Molecular Formula:
C21H18O5S
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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m-Cresol Purple is a pH indicator dye used primarily in spectrophotometric pH measurements. m-Cresol purple is acidic and hydrophobic. The useful pH ranges are 1.2 - 2.8 (red to yellow) and 7.4 - 9.0 (yellow to violet).

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

m-Cresol Purple, 1 g

sc-215274
1 g
$20.00

m-Cresol Purple, 5 g

sc-215274A
5 g
$53.00

m-Cresol Purple, 10 g

sc-215274B
10 g
$94.00