Optical brightener OB-1 is mainly used for lanon and widely applied to ABS, PS, HIPS,PA,PC, EVA and hard PVC etc.  Optical brightener

chemical name: 2,2-(4,-4'-vinyl biphenyl) dual benzoxazole

CAS No: 1533-45-5

Structural NO.: C.I.393

Molecular formula: C28H18N2O2

Molecular weight: 414.4

Appearance: Yellowish Green granule

Melting point: 353-359 oC

Purity:99.0% min

Application: It's highly efficient fluorecent whitening agent for PET,PBT, PP fibers, widely applied to ABS, PS, HIPS,PA,PC, EVA and hard PVC etc.

optical brightener OB-1