We mainly produce optical brightner (OB, OB-1, KCB, OBA-199, OBA-199:1, PF-127, CBS-351...)，2-Aminophenol CAS 95-55-6， o-nitrophenol CAS 88-75-5，2-Amino-4-tert-butylphenol CAS NO 1199-46-8， Thiophene-2,5-dicarboxylic acid CAS NO 4282-31-9，Terephthaldicarboxaldehyde CAS NO 623-27-8. Our company has gotten ISO9002 International quality system authentication.