欧美日本一区二区留学生,婷婷色五月另类综合视频,国产香日韩三级片,最新国产成人精品一区二区,亚洲-区二区三区精品,在线亚洲欧洲日产一区二区,91久久精品国产91久久性色tv ,久久国产香蕉视频,国产传媒一区二区三区呀,久久98精品久久久婷婷

Hongye Chemical Co., Ltd is the leading professional manufacturer and supplier of Thiourea Dioxide and pulp bleaching agent FAS. We can produce 50000MT Thiourea Dioxide(Formamidine sulfinic acid) &pulp bleaching agent FAS.

TDO is a new kind of reducing agent that used as exchange of sodium hydrosulfite. It is widely used in textile and paper making industry. This product is also used in leather processing industry, paper, pulp and board industry, photographic industry, bleaching and reducing agents. This product is also a component of decolorisation agents. In macromolecule material industry, it is used as catalysis agent and stabilizer of resinic producing, and it is also used in organic synthesization of sensitizing material, and medicine, medical, spicery materials in fine chemicals, and also can be applied in the recycling and separating of heavy metals.

Physical & Chemical Features

Byname: Formamidine Sulfinic Acid

Molecular Formula:（NH2）2CSO2

PH 4 （1% Solution）

CAS NO. 1758-73-2 or 4189-44-0

UN NO:3341

Dangerous Goods Class:4.2

Specification:

Purity: 99.%Min

Thiourea: 0.10%Max

Moisture:0.05%Max

Iron(Fe):10ppm Max

Sulphate: 0.17%Max