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M8256 Sigma-Aldrich

Methyl Red sodium salt

Crystalline

Synonym: 4-Dimethylaminoazobenzene-2′-carboxylic acid sodium salt, Acid Red 2

  • CAS Number 845-10-3

  • Empirical Formula (Hill Notation) C15H14N3NaO2

  • Molecular Weight 291.28

  •  Colour Index Number 13020

  •  Beilstein Registry Number 4065488

  •  EC Number 212-682-9

  •  MDL number MFCD00002426

  •  PubChem Substance ID 24897234

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Properties

Related Categories Analytical Reagents, Analytical/Chromatography, Cell Biology, Hematology and Histology, Indicators,
InChI Key   GNTPCYMJCJNRQB-CMBBICFISA-M
visual transition interval   4.2 - 6.2, pink to yellow

Description

Packaging

25 g in glass bottle

Application

Methyl red sodium salt is primarily used in microbiology in order to identify bacteria such as Enterobacter agglomerans in dye-contaminated sludge.

General description

Methyl Red is an azo dye that indicates the presence of acid in the culture medium, which is formed due to fermentation of sugar by bacteria. This red dye is reduced to orange color in the presence of acid. Methyl Red has been used as a part of IMViC (indole, methyl red, Voges-Proskauer and citrate utilization or catalase production test). IMViC is a biochemical test performed to differentiate among the coliforms, specifically Escherichia coli and Enterobacter aerogene.

Methyl red sodium salt is the sodium salt of methyl red synthetic dye, which belongs to the azo group of dyes.

Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
3

Documents

Certificate of Analysis

Certificate of Origin


Milli-Q® Water Purification Solutions
Protocols & Articles
Peer-Reviewed Papers
15

References

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