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Substance Name: Direct Red 81 free acid
RN: 25188-42-5
UNII: RLM8W5IPXB
InChIKey: IGXZMQCLUNTWCC-HSBKYFPUSA-N

Molecular Formula

  • C29-H21-N5-O8-S2

Molecular Weight

  • 631.6439
 
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Names and Synonyms

Name of Substance

  • Direct Red 81 free acid

Synonyms

  • 7-(Benzoylamino)-4-hydroxy-3-((4-((4-sulfophenyl)azo)phenyl)azo)-2-naphthalenesulfonic acid
  • EINECS 246-727-9
  • UNII-RLM8W5IPXB

Systematic Names

  • 2-Naphthalenesulfonic acid, 7-(benzoylamino)-4-hydroxy-3-((4-((4-sulfophenyl)azo)phenyl)azo)-
  • 7-Benzamido-4-hydroxy-3-((4-((4-sulphophenyl)azo)phenyl)azo)naphthalene-2-sulphonic acid

Superlist Name

  • C.I. Direct Red 81

Registry Numbers

CAS Registry Number

  • 25188-42-5

FDA UNII

  • RLM8W5IPXB

System Generated Number

  • 0025188425

Structure Descriptors

InChI

1S/C29H21N5O8S2/c35-28-25-15-12-23(30-29(36)18-4-2-1-3-5-18)16-19(25)17-26(44(40,41)42)27(28)34-33-21-8-6-20(7-9-21)31-32-22-10-13-24(14-11-22)43(37,38)39/h1-17,35H,(H,30,36)(H,37,38,39)(H,40,41,42)/b32-31+,34-33+

InChIKey

IGXZMQCLUNTWCC-HSBKYFPUSA-N

Smiles

c12c(ccc(c1)NC(=O)c1ccccc1)c(c(c(c2)S(=O)(=O)O)/N=N/c1ccc(cc1)/N=N/c1ccc(cc1)S(=O)(=O)O)O