More than 80% of the whole output has been exported to many countries and regions in the world. Mainly including Europe, America, Korea, Japan, Southeast Asia, Australia, the Mediterranean, etc. We have professional laboratory to test the quality of each batch strictly, to make sure product for each order is qualified.

Changyi Haosen Biotechnology Co., Ltd. is a professional late-model manufacturer of thiourea dioxide / pulp bleaching agent FAS. Our company has advanced technical power, advanced equipment, as well as complete test instruments, so the products are stable and reliable in quality. We have our own import and export operation rights. We have the production capability of thiourea dioxide/ pulp bleaching agent FAS to more than 7,000 tons a year.

Changyi Haosen Biotechnology Co., Ltd. is a most professional manufacturer of formamidine sulfinic acid?also called thiourea dioxide, CAS NO.: 4189-44-0 or 1758-73-2? in China. As a factory producing only this kind of product, we are more competitive not only in price, but also in quality and stable supply. Purity of our thiourea dioxide is 99%min. We have our own laboratory to test the quality of each batch strictly. Our productivity is more than 7000MTS/year and more than 80% is exported

CHEMICAL NAME Formamidine Sulfinic Acid or aminoiminomethanesulfinic acid or FAS TRADE NAME Thiourea Dioxide UN NO.:3341 Molecular Formula: CH4N2O2S CAS NO.: 1758-73-2 Molecular Weight: 108.12 Physical and chemical properties and main hazardous properties White or light yellow crystal powder, high reducibility when heating or in alkaline solutin, strong decomposition and releasing poisonous gas above 100 degrees. Purpose of the product FAS is a new-type, environmentally friendly products

Dear sir or madam, This is Li Qiao from Changyi Haosen Biotechnology Co., Ltd. We are one of the most professional manufactures of thiourea dioxide(CAS NO. 1758-73-2) in China. Purity is 99%min. Our annual production capability is more than 7000MTs and 80% of them are exported to many countries and regions in the world. If you have any interest, please feel free to contact me!

CHEMICAL NAME Formamidine Sulfinic Acid or aminoiminomethanesulfinic acid or FAS TRADE NAME Thiourea Dioxide UN NO.:3341 Molecular Formula: CH4N2O2S CAS NO.: 1758-73-2 Molecular Weight: 108.12 Physical and chemical properties and main hazardous properties White or light yellow crystal powder, high reducibility when heating or in alkaline solutin, strong decomposition and releasing poisonous gas above 100 degrees. Purpose of the product FAS is a new-type, environmentally friendly products