Methyl red, dark red powder ACS

Supplier: MP Biomedicals

Synonyms: 2-(4-Dimethylaminophenylazo)benzoic acid, 2-((4-(Dimethylamino)phenyl)diazenyl)benzoic acid

0215254580 0215254583
ICNA0215254580EA 97.2 GBP
ICNA0215254580 ICNA0215254583
Methyl red, dark red powder ACS
Methyl red

Methyl red is used in the Methyl Red (MR) Test, used to identify bacteria producing stable acids by mechanisms of mixed acid fermentation of glucose.


  • Visual transition interval from pH 4,2 (pink) to 6,2 (yellow)


Methyl red is used in the methyl red (MR) test, used to identify bacteria producing stable acids by mechanisms of mixed acid fermentation of glucose.


Soluble in ethanol.


Caution: Research Use Only (RUO).

Formula: C₁₅H₁₅N₃O₂
MW: 269,3 g/mol
Storage Temperature: Ambient
MDL Number: MFCD00002425
CAS Number: 493-52-7

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Specification Test Results

Melting Point 179 - 182 °C
Clarity of Alcohol Solution Passes Test
Visual Transition Interval From pH 4.2 (pink) to 6.2 (yellow)

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