Shandong Changyi Haosen Biotechnology Co., Ltd. is located in the northwest of beautiful Jiaodong Peninsula, the Chinese Salts Town - Changyi. It is in the coast of Bohai Sea, Laizhou Bay. With Yantai, Qingdao in the east, westward it is adjacent to Weifang City. Changyi is in "Qingdao one hour economic circle" and "Weifang half-hour economic circle". Not only the environment is beautiful but also the transportation is very convenient!
     Changyi Haosen Biotechnology Co., Ltd. is a professional late-model manufacturer of thiourea dioxide / pulp bleaching agent FAS. Our company has solid technical power, advanced equipment, as well as complete test instruments, so the products are stable and reliable in quality. With import and export operation rights on our own, we have the production capability of thiourea dioxide/ pulp bleaching agent FAS up to more than 7,000 tons a year. The quality of all the TDO produced by our company implements the People's Republic of China chemical industry standards HG / T3258-2010.
     By using new technological process, our thiourea dioxide crystalline granularity is more symmetrical and not easy to agglomerate. Our products also have good fluidity, great solubility and strong reducibility. As our products' external dryness is completely in comformity with the inside dryness, they are not easy to undergo spontaneous combustion, so the storage period has been greatly extended, which perfectly satisfies customers' needs. Our products have been exported to the USA, Japan, Korea, Europe and other dozens of countries and regions. They are widely used in textile printing and dyeing, papermaking, the synthesis of organic compounds,etc. and are highly praised by customers!
     Haosen Biotechnology Co., Ltd. always insists to honor the honesty and keep our promise! We warmly welcome your visit and cooperation!