Qingdao St-Arn Imp & Exp Co.,Ltd is an integrative enterprise with manufacturing and trading in water treatment chemicals, oil drilling chemicals,food additives, and so on. ST-ARN is sub-branch of Mas Group Inc.at QingDao, as a manufacturer, since 1998, Mas Group Inc.has invested to build their own factories for satisfying their customers request at the region of raw materials in Shandong which is the largest region of raw material in China. Mas Group Inc. will continually invest for some good products in near future.Meanwhile, as an international company, ST-ARN always seeks for becoming a reliable supplier to the customers who need different items of water treatment chemicals, oil drilling chemicals,food additives.Up to now, ST-ARN has been becoming the top brand in the international market.ST-ARN products are well exported to worldwide.Qingdao St-Arn Imp & Exp Co., Ltd., as a leading supplier for water treatment chemicals, oil drilling chemicals and food additives in China have own R&D Center and strict quality control system, cooperates closely with Famouse colleges and universities (eg,Qingdao University of Science&Technology) and International top quality inspection institutions (eg, SGS) for keeping the quality improving.