1、Thiourea Dioxide， another name： formamidine sulfinic acid， molecular formula：CH4N2O2S， PH ：4， risk rating： 4.2，CAS :1758-73-2，EINECS：217-157-8.
2、Appearance and Characteristics
The product is white or light yellow powdered crystal，no irritative smell。It is a kind of stable compound ，no oxidizability or reductibility。it has a good stability to heat，easy to store and transport，easy to operate。The product is much safer ,without pollution when producing and using，It is a new and environment-friendly substitute for sodium hydrosulfite。
3、Technical Indicators (People's Republic of China chemical industry standard (HG/T3258-2010))
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Item
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Superfine Grade
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Grade A
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Standard
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thiourea dioxide content （CH4N2O2S）（m/m）%≥
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99.00
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98.00
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96.00
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residual thiourea content （CH4N2S）（m/m）%≤
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0.20
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0.30
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0.50
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sulfate content (SO42-）（m/m）%≤
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0.17
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0.17
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0.27
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Iron content（Fe）（m/m）%≤
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0.001
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0.003
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0.005
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Moisture content （m/m）%≤
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0.10
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0.10
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0.10
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4、Packaging
①.25 KG or 50 KG plastic woven bags ②.25 KG kraft paper bags
③.50 KG fiber drums ④.500 KG or 1000 KG container bags
5、Use
1.it is widely used in the dyeing of vat dye and sulfur dye,bleaching of silk and wool,reduction chearing of disperse dye ,removal of reactive dyes poor dyeing,color processing of kinds of colored fiber ,cleaning of dye etc.
2.it is used for paper pulp bleaching and wastepaper deinking in the paper industry
3.it is used for milk gelling agent in the camera industry.
4.in polymer materials industry,be used as catalysts, stabilizers and polymerization agent；in precious metals recovery and separation be used as a separating agent ；in pharmacy, medicine, spices and other fine chemical industry and also applied.
6、Storage
It should be stored in storehouse whose ventilated condition is good,clean and dry,with room temperature is below 30 ℃。It should be far away from fire,heat source and direct sunlight。Keep the container seal,pay attention to moisture and rain。It should be stored apart with flammable or combustible material,reductant, sulfur,phosphorus。Avoid of hybrid storage and mixed transportation avoid of contacting with other material which is easy cause the decomposition of the product。
