Zhangjiagang YaXiYa Chemicals Co., ltd is one of the biggest manufacturers of Camphorsulfonic acid in the world.For the market demand, the company is also specialized in developing and manufacturing fine chemicals. More than 90% of its products are exported to Europe, USA, Japan, India and so on.Our main products are as follow: L-camphorsulfonic acid D-camphorsulfonic acid DL-camphorsulfonic acid 5-methyl-uracil（Thymine） 2, 4-Dihydroxypyrimidine（Uracil） DMPU(1, 3-Dimethyl-3, 4, 5, 6-tetrahydro-2(1H)-pyrimidinone) 3-Amino-4-methylthiophene-2-carboxylic acid methyl ester.