Methyl red, pure indicator

Supplier: Thermo Scientific
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Synonyms: 2-(4-Dimethylaminophenylazo)benzoic acid2-((4-(Dimethylamino)phenyl)diazenyl)benzoic acid

ACRO264440250EA 28.3 GBP
ACRO264440250 ACRO264445000 ACRO264441000
Methyl red, pure indicator
Methyl red
Formula: C₁₅H₁₅N₃O₂
MW: 269.3 g/mol
Melting Pt: 178…182 °C
Storage Temperature: Ambient
MDL Number: MFCD00002425
CAS Number: 493-52-7
EINECS: 207-776-1
Merck Index: 12,06199

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Specification Test Results

Appearance Dark red to brown to purple to violet Powder or crystals
Infrared spectrum Conforms
Melting point 178 to 182 °C
Solubility (0.1 % in ethanol) Clear
Specific extinction E (1%/1cm) ≥650 (430 nm, in buffer)
Visual transition interval from pH 4.2 (pink or red) to pH 6.2 (yellow)

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