Yantai Dasteck Chemicals Co., Ltd. is a comprehensive corporation combined with scientific, industrial and trading sectors. Our new products, paper auxiliary FAS and textile auxiliary SRA-1, have been successfully used in various paper and textile enterprises. We started to produce our main product Thiourea Dioxide in 1983, its annual capacity is 4000mt. Being the earliest TDO manufacturer in China, we were elected as the director of China TDO and Other Relevant Industry Association owing to our stability and excellent product quality. We enjoy a high reputation in the international market and achieved the ISO 9002 Quality System Certification.