CAS: 1-1-5424 Molecular Formula: C5H5N3O2 Molecular Weight (g/mol): 139.11 MDL Number: MFCD00003938 InChI Key: ZAGZIOYVEIDDJA-UHFFFAOYSA-N Synonym: 2-(2,4-Dinitrophenylazo)-1-naphthol-3,6-disulfonic acid, disodium salt,3-(2, 4-Dinitrophenylazo)-4-hydroxy-2, 7-naphthalenedisulfonic acid,2-(2, 4-Dinitrophenylazo)-1-naphthol-3, 6-disulfonic acid PubChem CID: 72656 IUPAC Name: 3-aminopyrazine-2-carboxylic acid SMILES: C1=CN=C(C(=N1)C(=O)O)N