CAS: 23647-14-5 Molecular Formula: C16H10N2Na3O11S3+ Molecular Weight (g/mol): 571.408 MDL Number: MFCD00003952 InChI Key: LSAWBVPBZOEGOT-UHFFFAOYSA-L Synonym: Sulfanilic acid azochromotrope; 2-(4-Sulfophenylazo)chromotropic acid trisodium salt PubChem CID: 73658865 IUPAC Name: trisodium;5-hydroxy-4-oxo-3-[(4-sulfophenyl)hydrazinylidene]naphthalene-2,7-disulfonate SMILES: C1=CC(=CC=C1NN=C2C(=CC3=CC(=CC(=C3C2=O)O)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)O.[Na+].[Na+].[Na+]