Kunshan Haite Plastic Pigment Co., Ltd. founed in 1992, specializes in the production of fluorescent tracers for industrial water treatment chemicals. The main product 1,3,6,8-pyrenetetrasulfonic acid tetrasodium salt (short as PTSA, CAS: 59572-70-0) and 8-Hydroxy-1,3,6-pyrenetrisulfonic acid trisodium salt, also called Solvent green 7 ,CAS:6358-69-6. Haite is the only manufacturer of PTSA & Solvent green 7 in China. Click for details>>