CAS:13001-40-6 ER in the form of refined powder is very suitable for whitening and brightening polyester fiber and has good whitening effect on plastics such as PE,PP and PVC and their process of shaping with polyester chips or recovered polyester chiaps.In addition,the refined powder is widely used in coating industry.Looking for ideal Optical Brightener Manufacturer & supplier ? We has a wide selection at great prices to help you get creative. All the Fluorescent Whitening are quality guaranteed. We are China Origin Factory of Plastive Additive. If you have any question, please feel free to contact us.