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Substance Name: O-Methyl red
RN: 493-52-7
UNII: 69083AX1ZX
InChIKey: CEQFOVLGLXCDCX-WUKNDPDISA-N

Molecular Formula

  • C15-H15-N3-O2

Molecular Weight

  • 269.302
 

Classification Codes

Classification Codes

  • Coloring Agents
  • Mutation Data
  • Tumor Data

Superlist Classification Code

  • Overall Carcinogenic Evaluation: Group 3
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Names and Synonyms

Name of Substance

  • Methyl red
  • o-Methyl red

Synonyms

  • 2-((4-Dimethylamino)phenylazo)benzoic acid
  • 2-Carboxy-4'-(dimethylamino)azobenzene
  • 4'-Dimethylaminoazobenzene-2-carboxylic acid
  • 4-Dimethylamino-2'-carboxylazobenzene
  • Benzoic acid, 2-((4-dimethylamino)phenylazo)-
  • Benzoic acid, o-((p-(dimethylamino)phenyl)azo)-
  • C.I. 13020
  • C.I. Acid Red 2
  • CCRIS 2250
  • Cerven kysela 2
  • Cerven kysela 2 [Czech]
  • Cerven methylova
  • Cerven methylova [Czech]
  • CI 13020
  • CI Acid Red 2
  • Dimethylaminoazobenzene-2-carboxylic acid
  • EINECS 207-776-1
  • HSDB 2786
  • Methyl red
  • NSC 215212
  • o-((p-(Dimethylamino)phenyl)azo)benzoic acid
  • o-Methyl red
  • p-(Dimethylamino)azobenzene-o-carboxylic acid
  • UNII-69083AX1ZX

Systematic Names

  • 2-(4-Dimethylaminophenylazo)benzoic acid
  • Benzoic acid, 2-((4-(dimethylamino)phenyl)azo)-
  • Benzoic acid, 2-(2-(4-(dimethylamino)phenyl)diazenyl)-
  • C.I. Acid Red 2 (8CI)

Superlist Names

  • C.I. Acid Red 2
  • Methyl red

Registry Numbers

CAS Registry Number

  • 493-52-7

FDA UNII

  • 69083AX1ZX

Related Registry Number

  • 845-10-3 (hydrochloride salt)

System Generated Number

  • 0000493527

Structure Descriptors

InChI

1S/C15H15N3O2/c1-18(2)12-9-7-11(8-10-12)16-17-14-6-4-3-5-13(14)15(19)20/h3-10H,1-2H3,(H,19,20)/b17-16+

InChIKey

CEQFOVLGLXCDCX-WUKNDPDISA-N

Smiles

c1(c(cccc1)C(O)=O)\N=N\c1ccc(N(C)C)cc1

Physical Properties

Physical Property Value Units Temp (deg C) Source
Melting Point 183 deg C   EXP
pKa Dissociation Constant 2.63 (none) 28 EXP
log P (octanol-water) 3.830 (none)   EST
Water Solubility 3.670 mg/L 25 EST
Vapor Pressure 1.44E-07 mm Hg 25 EST
Henry's Law Constant 4.71E-12 atm-m3/mole 25 EST
Atmospheric OH Rate Constant 1.50E-10 cm3/molecule-sec 25 EST

Physical property data is provided to ChemIDplus by SRC, Inc.