Qingdao Kehai Biochemistry Co., Ltd, a subsidiary company of Qingdao Langyatai Group Co., Ltd, is Qingdao high-tech enterprise and key biotechnology enterprise. The main products are itaconic acid and derivative of itaconic acid, sodium gluconate-based products, Ruimin ecological fertilizers r and so on. The company possesses the annual output of 20,000 tons itaconic acid, 50, 000 tons sodium gluconate, 2,000 tons delta-gluconolactone, 2,000 tons gluconic acid, 2,000 tons calcium gluconate and 50,000 tons eco-fertilizer. The company is the largest producer and the largest R&D base of itaconic acid products in the world