CAS:5242-49-9 KSN chemical structure is similar to OB-1,but has much better whitening effects than OB-1 on polyester fibres and Plastics,its compatibility with plastics is better than OB-1 too,highly whitening effects is available with only small dosage,KSN has a good resistance to high temperature as well as excellent resistance to light and weather.Applied to whiten polyester,polyamide and polycarylonitrile fibres,used in film,plastic pressing & injection process too.Suitable for whitening high polymers and could be added at any point during synthesizing.Looking for ideal Optical Brightener Manufacturer & supplier ? We have 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.