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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Reference substances

Reference substances

Currently viewing:
IUPAC name:
disodium 4-[(E)-2-(4-methyl-2-sulfophenyl)diazen-1-yl]-3-oxidonaphthalene-2-carboxylate

Inventory

EC number:
227-497-9
EC name:
Disodium 3-hydroxy-4-[(4-methyl-2-sulphonatophenyl)azo]-2-naphthoate
CAS number:
5858-81-1
CAS number:
5858-81-1
Synonyms
Names:
Identifier:
Colour Index
CI 15850
Identifier:
common name
D&C Red 6
Identifier:
common name
Pigment Red 57

Molecular and structural information

Molecular formula:
C18H14N2O6S.2Na
Molecular weight:
430.347
SMILES notation:
c12c(c(c(C(=O)[O-])cc1cccc2)O)\N=N\c1c(cc(C)cc1)S(=O)(=O)[O-].[Na+].[Na+]
InChl:
1S/C18H14N2O6S.2Na/c1-10-6-7-14(15(8-10)27(24,25)26)19-20-16-12-5-3-2-4-11(12)9-13(17(16)21)18(22)23;;/h2-9,21H,1H3,(H,22,23)(H,24,25,26);;/q;2*+1/p-2/b20-19+;;
Structural formula:
Chemical structure

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