Zhengdan Group is a state-owned enterprise engaged in the development and manufacture of fine chemical products. It has self-support import/export right. It was assigned as "Key Hi-tech Enterprise" by the State Science&Technology Ministry. And notably it is ISO9000:2000 and ISO14000:2000 certified. Now it has an area of 150,000 M2, with about 1000 employees and a total assets of 350 million yuan. The total output is 50,000 tons per year.

Our main products include trimellitic anhydride, p-diethylbenzene, Sodium methallylsulfonate, methallyl chloride, iso-propyl ether, m-phthalic acid. The quality of these products and the production technique utilized all reach highest level in China and even in the world market. The trimellitic anhydride was developed in 1996 and the annual production was 5,000 tons at the time. Since 2001 its annual output reaches 35,000 tons via a patent-protected non-stop oxidizing method.

Our company has been growing in the past decade while we consistently focusing on marketing and new products development. Our products have been well receiving by the customers not only in China, but in South East Asia, EU and US.