Shandong Tianan Chemicals Co., Ltd, locates in Linpan Street office, Linyi Country, Dezhou City, Shandong, and adjoins to 104 State Road(1km away). Established in 2006, Tianan is dedicated to the manufacture of gas phosgene derivatives.

Shandong Tianan covers over 466,000 square meters of land, and has total staff of 450 in which the technician is 50. Tianan's capability of gas phosgene is annually 50,000 metric tons, and has more than 10 products, such as Stearoyl chloride, Methylaminoformyl chloride, AKD, chloroformate, and so on. The products are widely used for paper making chemical, pharma intermediate and agrochemical.

Shandong Tianan was restructured in June 2010, and it's Dezhou's first company in Tianjin Equity Exchange listing of non-listed companies. In June 2011, Tianan was acquired successfully by Suzhou Tianma Specialty Chemicals Co., Ltd (registered capital of RMB107.9015million) which is a company listed on the Shenzhen Stock Exchange.