carry on to boost, to guarantee products excellent in line with market and consumer standard specifications. Our enterprise has a quality assurance system are actually established for 3-Aminonaphthalene-1,5-Disulphonic Acid, 2,6-Naphthalenedisodium Acid, Disodium Salt, 2-Hydroxy-4-Sulfohydroxide-1-Naphthalenediazonium, Inner Salt, Alpha Naphthylamine,Solvent Yellow 93. sincerity and strength ,always keep approved good quanlity ,welcome to our factoty for visit and instruction and business. The product will supply to all over the world, such as Europe, America, Australia,Slovenia, Guatemala,Nairobi, Houston.Adhering to the management tenet of "Managing Sincerely, Winning by Quality", we try our best to provide excellent products and service to our clients. We look forward to making progress together with domestic and international clients.