He Fei Teng Chao Chemical Material Co.,Ltd.(REFRA) is a medium-sized chemical corporation specialized in the manufacturing and sales of fine chemical materials .Guided by the principle of high quality,high reputation,and high technology,we have been sticking to provide the best service and high quality product to our customers. Founded in 2008, we are very strong in products such as Polyvinylpyrrolidone(PVP),2-Pyrrolidone,N-methyl pyrrolidone, N-Ethyl Pyrrolidone, Gamma-butyrolactone ，Povidone Iodine etc. Annual output of N-Methyl Pyrrolidone is 100,000MT/Year, 2-Pyrrolidone is 10,000MT/Year.