Optical Brightener OB CAS 7128-64-5

2,5-Di(5-tert-butylbenzoxazol-2-yl)thiophene is used for whitening treatment of PVC, polystyrene, ABS resin, polyolefin and polyester, also used for whitening of acetate, polymethyl methacrylate, foam artificial leather. It is also used in varnishes, paints, UV-curable coatings, printing inks, fats, oils, and packaging materials. Apply this product in printing ink for anti-counterfeit mark. It can be used in photography to improve the whiteness of the non-image area of the photo, and can make the photo transform into fluorescence when exposed to ultraviolet light. Produce whitening and lightening effect. Item Specifications Appearance Slight greenish yellow powder Content (HPLC)…