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Reference substances

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IUPAC name:
1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-((4-sulfo-1-naphthalenyl)azo)-, trisodium salt

Inventory

EC number:
220-036-2
EC name:
Trisodium 1-(1-naphthylazo)-2-hydroxynaphthalene-4',6,8-trisulphonate
CAS number:
2611-82-7
CAS number:
2611-82-7
Synonyms
Names:
Identifier:
IUPAC name
trisodium 7-hydroxy-8-[(4-sulfonato-1-naphthyl)diazenyl]naphthalene-1,3-disulfonate
Identifier:
Colour Index
C.I. 16255
Identifier:
common name
Acid Red 18
Identifier:
common name
Ponceau R

Molecular and structural information

Molecular formula:
C20H14N2O10S3.3Na
Molecular weight:
604.479
SMILES notation:
c12c(cc(S(=O)(=O)[O-])cc2S(=O)(=O)[O-])ccc(c1\N=N\c1c2c(c(S(=O)(=O)[O-])cc1)cccc2)O.[Na+].[Na+].[Na+]
InChl:
1S/C20H14N2O10S3.3Na/c23-16-7-5-11-9-12(33(24,25)26)10-18(35(30,31)32)19(11)20(16)22-21-15-6-8-17(34(27,28)29)14-4-2-1-3-13(14)15;;;/h1-10,23H,(H,24,25,26)(H,27,28,29)(H,30,31,32);;;/q;3*+1/p-3/b22-21+;;;
Structural formula:
Chemical structure

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