苏州龙沙化工有限公司是前美国奥麒化工公司在苏州独资设立的子公司，占地面积为62414.8平方米。苏州工厂于2005年开始投建， 整个项目分为三期建成： 一期项目行政办公楼及活性酵母精华(TRF)生产车间与实验室；二期项目生物杀菌剂（锌奥米啶ZPT /铜奥米啶CUPT）干燥与制粒以及三期项目生物杀菌剂（ZPT/CUPT）的生产， 整个工厂于2008年建成并成功试产， 2009年通过关键客户的产品认可和批准， 继而开始整个工厂的规模投产及运营。苏州工厂于2010年通过 ISO9001质量体系认证。2011年，龙沙集团收购奥麒集团。 继此，奥麒化工（中国）有限公司正式成为龙沙微生物控制业务部的一家生产厂。Suzhou Lonza Ltd., is the wholly owned subsidiary of the former U.S. Arch Chemicals established in Suzhou, covering an area of 62,414.8m2. Suzhou plant started construction in 2005 and the entire project was built in three phases: Phase 1 project is administrative office and active yeast extract (TRF) production workshop and laboratory; Phase 2 project is biocides (Zinc Omadine ZPT / Copper Omadine CuPT) drying and granulation as well as Phase 3 project biocides (ZPT / CUPT) production, and the entire plant was completely built in 2008 and succeeded in trial production, and in 2009 after product recognition and approval by key customers, and then scale production and operations were started in the entire plant. Suzhou plant passed ISO9001 quality system certification in 2010. In 2011, Lonza Group acquired the Arch Group. Then Arch Chemicals (China) Co., Ltd., officially became a production plant of LMC.