Dear Sir, We are a manufacturer of hydroquinone ,tech/photo grade,2300/mt per year and catechol 99% 2300/mt per year total in 4600/mt ,located in Lianyungang city, China. It was already obtained ISO9001:2000,ISO14001:1996 and GB/T28001-2001 ie.the Occupational Health and Safety Management System on date of issure 16 May 2003. Please feel free to contact us if you are interested in any of them the moment. We make sure to supply you highest quality and quantity goods in time and good services in all. Your high attention and prompt reply will be appreciated. Best regards, Jefferson Chen Lianyungang Sanjili Chemical Industry Co.,Ltd. No.14,Kunlunshan Rd,Economic and Technical Development Zone,Lianyungang,China Postcode:222047 Tel: 86 518 2346257,2344999,2346820 Fax: 86 518 2342007 email: