Zhonghao (Dalian) Research and Design Institute of Chemical Industry Co., Ltd (DRDI) is an institute specializing in R&D and production of series products. The institute possesses a group of staff members with high-level competence, Its research and development mainly focuses on synthesis of fine special chemicals, such as plastic aids; Intermediates preparation for medicines, pesticides and dyestuff; Biochemical technology. Nowadays DRDI can produce more than 10 categories of products, Its product plants have the capability to produce kinds of chemicals according to customer's orders, such as ultraviolet absorbent series, antioxidant series, Fluorescent whitening agent series, intermediate of dying and pesticide. With the best service and the most competitive price, our products o..