CAS 6266-54-2 appears in our catalog under these names: SM27/ 98.83% (existing batch purity), 6,6'-(Carbonylbis(azanediyl))bis(4-hydroxynaphthalene-2-sulfonic acid), SM27. Offered by: TargetMol, Chemat, MedChemExpress. Available pack sizes: 1mg, 1 mg.