Methyl orange

CAS Registry Number®

547-58-0
No image available.

CAS Name

Methyl orange

Molecular Formula

C14H15N3O3S.Na

Cite this Page

Methyl orange.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=547-58-0 (retrieved 2021-10-22) (CAS RN: 547-58-0).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Melting Point (1)

    >300 °C
  • Density (2)

    1.468 g/cm3

Source(s)

Other Names and Identifiers

InChI

InChI=1S/C14H15N3O3S.Na/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);

InChIKey

InChIKey=LOJHDGOZROMANL-UHFFFAOYSA-N

SMILES

N(=NC1=CC=C(N(C)C)C=C1)C2=CC=C(S(=O)(=O)O)C=C2.[Na]

Canonical SMILES

[Na].O=S(=O)(O)C1=CC=C(N=NC2=CC=C(C=C2)N(C)C)C=C1

Other Names for this Substance

  • Benzenesulfonic acid, 4-[2-[4-(dimethylamino)phenyl]diazenyl]-, sodium salt (1:1)
  • Orange III
  • Benzenesulfonic acid, p-[[p-(dimethylamino)phenyl]azo]-, sodium salt
  • Benzenesulfonic acid, 4-[[4-(dimethylamino)phenyl]azo]-, sodium salt
  • C.I. 13025

Deleted or Replaced CAS Registry Numbers

1342-24-1, 66777-17-1, 1773488-61-1