2,7-Naphthalenedisulfonic acid, 4-amino-3-[2-(4-aminophenyl)diazenyl]-5-hydroxy-6-(2-phenyldiazenyl)-, sodium salt (1:2)

CAS Registry Number®

5850-39-5

CAS Name

2,7-Naphthalenedisulfonic acid, 4-amino-3-[2-(4-aminophenyl)diazenyl]-5-hydroxy-6-(2-phenyldiazenyl)-, sodium salt (1:2)

Molecular Formula

C22H18N6O7S2.2Na

Molecular Mass

588.53

Cite this Page

2,7-Naphthalenedisulfonic acid, 4-amino-3-[2-(4-aminophenyl)diazenyl]-5-hydroxy-6-(2-phenyldiazenyl)-, sodium salt (1:2).   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=5850-39-5 (retrieved 2025-03-26) (CAS RN: 5850-39-5).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Melting Point (1)

    >300 °C

Source(s)

Other Names and Identifiers

InChI

InChI=1S/C22H18N6O7S2.2Na/c23-13-6-8-15(9-7-13)26-27-20-16(36(30,31)32)10-12-11-17(37(33,34)35)21(22(29)18(12)19(20)24)28-25-14-4-2-1-3-5-14;;/h1-11,29H,23-24H2,(H,30,31,32)(H,33,34,35);;

InChIKey

InChIKey=QGUPYUJOYPRMOU-UHFFFAOYSA-N

SMILES

NC=1C2=C(C=C(S(=O)(=O)O)C1N=NC3=CC=C(N)C=C3)C=C(S(=O)(=O)O)C(N=NC4=CC=CC=C4)=C2O.[Na]

Canonical SMILES

[Na].O=S(=O)(O)C1=CC2=CC(=C(N=NC3=CC=C(N)C=C3)C(N)=C2C(O)=C1N=NC=4C=CC=CC4)S(=O)(=O)O

Other Names for this Substance

  • 2,7-Naphthalenedisulfonic acid, 4-amino-3-[2-(4-aminophenyl)diazenyl]-5-hydroxy-6-(2-phenyldiazenyl)-, sodium salt (1:2)
  • C.I. Acid Green 20, disodium salt
  • 2,7-Naphthalenedisulfonic acid, 4-amino-3-[(4-aminophenyl)azo]-5-hydroxy-6-(phenylazo)-, disodium salt
  • C.I. Acid Green 20
  • C.I. 20495

View All

Deleted or Replaced CAS Registry Numbers

84842-82-0

CAS INSIGHTSTM
A hexagon honeycomb pattern featuring icons representing Data Fabric Analytics, Antennas, Construction, DNA, and Sustainability Bamboo. Each hexagon contains a distinct symbol related to its theme, arranged in a visually appealing and interconnected design.