Product:Fluorescent brightener OB-1 CAS NO.:1533-45-5 C.I.393 Molecular Formula:C28H18N2O2 Molecular Weight:414.4 Appearance: yellowish green crystal powder MP:359℃ Application: OB-1 is used widely in the polyester fiber market. because of its excellent brightening ability, good thermal stability and compatibility with many polymers, OB-1 is effective optical brightener for many plastics. OB-1 also used in recycled polymer to obtaining whiten effect. OB-1 complies with regulation s for indirect food additives Packing: 25Kg cardboard drum double lined with plastic bag