5(or 8)-[2-(7-Amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl]-8(or 5)-[2-[4-(2-phenyldiazenyl)-6(or 7)-sulfo-1-naphthalenyl]diazenyl]-2-naphthalenesulfonic acid

CAS Registry Number®

8003-57-4

CAS Name

5(or 8)-[2-(7-Amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl]-8(or 5)-[2-[4-(2-phenyldiazenyl)-6(or 7)-sulfo-1-naphthalenyl]diazenyl]-2-naphthalenesulfonic acid

Molecular Formula

C36H25N7O10S3.3Na

Cite this Page

5(or 8)-[2-(7-Amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl]-8(or 5)-[2-[4-(2-phenyldiazenyl)-6(or 7)-sulfo-1-naphthalenyl]diazenyl]-2-naphthalenesulfonic acid.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=8003-57-4 (retrieved 2024-12-23) (CAS RN: 8003-57-4).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Other Names and Identifiers

Other Names for this Substance

  • 2-Naphthalenesulfonic acid, 5(or 8)-[2-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl]-8(or 5)-[2-[4-(2-phenyldiazenyl)-6(or 7)-sulfo-1-naphthalenyl]diazenyl]-
  • C.I. Direct Black 56
  • 2-Naphthalenesulfonic acid, 5(or 8)-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-8(or 5)-[[4-(phenylazo)-6(or 7)-sulfo-1-naphthalenyl]azo]-, trisodium salt
  • 5(or 8)-[2-(7-Amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl]-8(or 5)-[2-[4-(2-phenyldiazenyl)-6(or 7)-sulfo-1-naphthalenyl]diazenyl]-2-naphthalenesulfonic acid
  • C.I. 34170

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