m-Cresol purple sodium salt 90% (dye content), Sigma-Aldrich®

Supplier: SIGMA-ALDRICH MICROSCOPY

Synonyms: m-Cresolsulphonphthalein sodium salt, 3,3-Bis(4-hydroxy-2-methylphenyl)-3H-benzo[d][1,2]oxathiole 2,2-dioxide, sodium salt

M-Clarity™ quality level = MQ200

211761-10G 211761-1G 211761-5G
211761-10GEA 175 GBP
211761-10G 211761-1G 211761-5G
m-Cresol purple sodium salt 90% (dye content), Sigma-Aldrich®
m-Cresol purple sodium salt

m-cresol purple sodium salt (MCP) is a colorimetric pH indicator dye. The dye is blue in anionic form and yellow in protonated form. It has been used to measure pH of seawater using a spectrophotometer.

Formula: C₂₁H₁₇NaO₅S
MW: 404,42 g/mol
Storage Temperature: Room Temperature
MDL Number: MFCD00010177
CAS Number: 62625-31-4
EINECS: 263-656-9
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Specification Test Results

Appearance (Colour) Black
Appearance (Form) Conforms to Requirements
Powder, Crystalline Powder or Flakes
Infrared spectrum Conforms to Structure
Wavelength 433 - 439 nm
c = 0.008 g/l, H₂O
Extinction Coefficient ≥15000

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