Chemical synonyms: 1-(2-Hydroxy-4-sulfo-1-naphthylazo)-2-naphthol-3,6-disulfonic acid trisodium salt; 3-Hydroxy-4-(2-hydroxy-4-sulfo-1-naphthylazo)naphthalene-2,7-d Product Brand: Analytical Density (g/cm3): 1.14 Molecular weight: 620.47 Molecular formula: C20H11N2Na3O11S3