a-acetylene-r-butyrolactone(ABL) CAS NO.517-23-7

we have our  own factories  , shandong qingyun changxin chemical science-tech Co.,LTD .,Now It has 50000 tons of gamma butyrolactone ,50000 tons of N-methyl pyrrolidone and 10000 tons of a-pyrrolidone(a-p)combined device.Is the largest chemical entity specialized in the production and operation of gamma-butyrolactone(GBL),N-mrthyl pyrrolidone（NMP），a-pyrrolidone(a-p) and other series of products. 

NMP (N-Methyl pyrrolidone)

CAS:                     517-23-7

 Molecular formula:  C6H8O3

shangdong qingyun changcin chemical Science-tech Co.,Ltd.,Incorprated on june 6,2009.

holding on the quality management principle of "fine management,contiuous improvement ,quality first and customer satisfaction',the company is able to provide various high-quality eco-solvents for lithium batteries,semiconductors,liquid crystal displays insulation materials aramid fiber ,polymeric materials ,coatings ,pharmaceuticals,veternary drugs,petrochemicals,cleaning,inks ,argricultural chemistry and other sectors.

For these years,cahgxin always provides high-quality products and professional services for domestic and foreign customers with extensive experience in the chemical industry and good reputation to win customer's trust and support . in the future ,changxin willl continue to adhere to the business philosophy of "keeping progress and making good faith "and continue to improve its image as an excellent supplier in order to enhance the market competitiveness ,build a corporate brand and develop toward a specialized and large-scale enterprise ,making muremitting efforts to promote the development of related industrides in china.