Syntex-OB is with appearance of light yellow or milk white powder, as a compound of benzoxazole type and melting point 196-203°C. It is hardly soluble in water, but soluble in paraffin, mineral oils and ordinary organic solvents. Syntex-OB can be used for whitening thermoplastic plastics, PVC, PS, PE, PP, ABS, Acetate fiber, paint, coating, printing ink, etc. It can be added at any stage in process of whitening the polymers and can give the finished products a bright bluish white glaze.