optical brightener OB(O.B.A. OB)

optical brightener OB OB is a high molecular weight optical brightener of the thiophenediyl benzoxazole class, suitable for the optical brightener of polymers at all stage of processing. Key Words: optical brightening agent OB, optical brightener OB, fluorescent brightener OB, optical whitening agent OB, brightener OBTypical Properties: Chemical Name: 2,2-(2,5-Thiophenediyl) Bis[5-(1,1-dimethylethy)] Benzoxazole Molecular Formula: C27H27O2N2S Molecular Weight: 443 CAS No.: 7128-64-5 C.I.: 184 Specifications: Appearance: Yellowish or yellowish green crystal powder Assay: 99% min. Melting Point: 196-203 Ash: 0.3% max. Volatile Content: 0.3%max. Particle size: 200 meshes Max. Absorption Wavelength: 375nm(in ethanol) Application: It can be used to whiten PVC, polystyrene, polypropylene, PA, PMMA, PE,PP, Paint, coating, printing ink and so on. Packing:25kg / fiber drum with PE liner