Since the establishment of HANGZHOU YANCHEN CHEMICAL CO.,LTD ,thecompany has been commintted to the development and production of opticalbrighteners and PVC stabilizers,mainly in Lead salt composite stabilizer,Ca-Znenvironmental protection stabilizer,tribasic sulfate,dibasic lead phosphite,stearate series and lubricating series,etc.It is widely used in pvc pipes,fittings,profiles,door and window profiles,panels,cable materials,foaming productsand others.Up to now,the total annual production capacity is more than40,000 tons,which is expected to continue to grow in the future.