上海大宇生化有限公司（上海大恒化工有限公司）

Shanghai Dayu Biochemical Co., Ltd. is a high-tech enterprise in Shanghai dedicated to the development and production of calcium-plastic raw materials and related products. Established in 1990, the company is one of the earliest enterprises in China engaged in calcium carbonate production. After more than a decade of development, Dayu has formed an annual production capacity of 50,000 tons of various types of calcium carbonate and a relatively complete product series, with the overall technology of its main products reaching international advanced levels. It holds a leading position in the domestic industry. The company has passed the ISO9001:2000 quality system certification. With excellent product quality and a commitment to诚信 service, the company has earned a strong reputation both domestically and internationally, becoming a stable supplier of raw materials and intermediates for many world-renowned companies. Its products are now exported to Europe, the United States, Africa, Southeast Asia, and other countries.