CAS 50402-56-7 appears in our catalog under these names: N-(Aminoethyl)-5-naphthylamine-1-sulfonic Acid, EDANS, EDANS/ 99.73% (existing batch purity), EDANS 95%, 5-((2-Aminoethyl)amino)naphthalene-1-sulfonic acid, 95%, 95%. Offered by: TRC, GLPBio, TargetMol, Biosynth, Ambeed. Available pack sizes: 1g, 25g, 5g, 100mg, 10mM (in 1ml dmso), 50mg, 250mg, 500mg.