Optical Brightener Ob-1 for PVC, ABS, EVA, PS

Chemical Name 2,2'-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole Molecular Formula       C7H5O4SNa Molecular Weight         414.4 Structure          CAS Number    1533-45-5   Specification     Appearance:       Yellowish green powder                     Melting point:        357~361°C                     Assay:       98%                     Volatiles Content    0.5%max                     Ash content:          0.50%max   Packing            25 kg / PE drum   Applications     Fluorescent brightener OB-1 mainly used in plastic material such as PVC, ABS, EVA, PS, etc. It also widely used in variety of polymer substance, especially polyester fiber, PP fiber.   /* March 10, 2023 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1