Qingdao ST-ARN Imp & Exp Co., Ltd. is an integrative enterprise specializing in the manufacture and trading of water treatment chemicals, oil drilling chemicals, food additives, seafood and textiles. Qingdao St-Arn Import & Export Co., Ltd. is a sub-branch of Mas Group Inc. in Qingdao. As a manufacturer, we built our own factories for satisfying customers requests in raw material region in Shandong, which is the largest region of raw material in China. Mas Group Inc. will continually invest in some quality products in the near future. Meanwhile, as an international company, Qingdao St-Arn Import & Export Co., Ltd. always seeks for becoming a reliable supplier of customers who need different kinds of water treatment chemicals, oil drilling chemicals, food additives, seafood and textile products. Up to now, Qingdao St-Arn Import & Export Co., Ltd. is a top brand in international market. Our products are well exported worldwide. Qingdao St-Arn Import & Export Co., Ltd., as a leading supplier of water treatment chemicals, oil drilling chemicals, food additives, seafood and textile products in China, has our own strict quality control system and cooperates closely with international top quality inspection institutions (such as SGS) for keeping quality improvement.