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Substance Name: Methyl orange
RN: 502-02-3
InChIKey: IETWCRRCPURZOC-FOCLMDBBSA-N

Classification Code

  • Indicators and Reagents

Molecular Formula

  • C14-H15-N3-O3-S

Molecular Weight

  • 305.357
 
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Names and Synonyms

Name of Substance

  • Methyl Orange

Synonyms

  • 4'-Sulfo-N,N-dimethyl-4-aminoazobenzene
  • 4-(4-Dimethylaminophenylazo)benzenesulfonic acid
  • 4-(4-Sulfophenylazo)-N,N-dimethylaniline
  • 4-(Dimethylamino)azobenzene-4'-sulfonic acid
  • EINECS 207-932-9
  • Methyl orange (acid form)
  • NSC 9595
  • p-((p-(Dimethylamino)phenyl)azo)benzenesulfonic acid

Systematic Names

  • 4-((4-(Dimethylamino)phenyl)azo)benzenesulphonic acid
  • Benzenesulfonic acid, 4-((4-(dimethylamino)phenyl)azo)-
  • Benzenesulfonic acid, 4-(2-(4-(dimethylamino)phenyl)diazenyl)-
  • Benzenesulfonic acid, p-((p-(dimethylamino)phenyl)azo)- (8CI)

Registry Numbers

CAS Registry Number

  • 502-02-3

Related Registry Number

  • 547-58-0 (hydrochloride-salt)

System Generated Number

  • 0000502023

Structure Descriptors

InChI

1S/C14H15N3O3S/c1-17(2)13-7-3-11(4-8-13)15-16-12-5-9-14(10-6-12)21(18,19)20/h3-10H,1-2H3,(H,18,19,20)/b16-15+

InChIKey

IETWCRRCPURZOC-FOCLMDBBSA-N

Smiles

O=S(=O)(O)c1ccc(\N=N\c2ccc(N(C)C)cc2)cc1

Physical Properties

Physical Property Value Units Temp (deg C) Source
log P (octanol-water) 1.130 (none)   EST
Water Solubility 42.1 mg/L 25 EXP
Atmospheric OH Rate Constant 1.49E-10 cm3/molecule-sec 25 EST

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