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Reference substances

Reference substances

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General information

Inventory

EC number:
217-699-5
EC name:
Trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate
CAS number:
1934-21-0

No inventory information available

Reference substance information

IUPAC name:
trisodium 5-hydroxy-1-(4-sulphophenyl)-4-(4-sulphophenylazo)pyrazole-3-carboxylate
Synonyms
Names:
Identifier:
Colour Index
C.I. 19140
Identifier:
common name
Tartrazine

CAS information

CAS number:
1934-21-0

Molecular and structural information

Molecular formula:
C16-H12-N4-O9-S2.3Na
Molecular weight:
534.368
SMILES notation:
n1(c2ccc(cc2)S(=O)(=O)[O-])c(c(c(n1)C(=O)[O-])/N=N/c1ccc(cc1)S(=O)(=O)[O-])O.[Na+].[Na+].[Na+]
InChl:
1S/C16H12N4O9S2.3Na/c21-15-13(18-17-9-1-5-11(6-2-9)30(24,25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;;;/h1-8,13H,(H,22,23)(H,24,25,26)(H,27,28,29);;;/q;3*+1/p-3/b18-17+;;;
Structural formula:
Chemical structure