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Thiourea dioxide CAS#1758-73-2

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Chemical Name：Thiourea dioxide

CAS No.1758-73-2

Molecular Formula：CH4N2O2S

Molecular weight:108.12

Sample: Available

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Product Details

Products Description of Thiourea dioxide CAS#1758-73-2

Thiourea dioxide is also known as carboxamidine sulfinic acid and aminoiminomethanesulfinic acid. It is a stable compound with neither oxidizing nor reducing properties. It is precipitated from ethanol as colorless to white needle-shaped crystals or crystalline powder. It is odorless. Relative molecular weight 108.12. Relative density 1.4. Melting point 126℃ (decomposition). The solubility in water at room temperature is 2% to 3%, and the aqueous solution is neutral or weakly alkaline. It decomposes at 50-60℃ or in alkali solution, and sulfinic acid and urea are released. It is soluble in concentrated sulfuric acid, slightly soluble in acetic acid, and insoluble in general organic solvents. The product is stable when dry and low temperature; it is easy to turn yellow under high temperature and humid conditions, and releases heat, and precipitates are generated above 30℃. The oral LD50 of rats is 2260mg/kg.

Thiourea dioxide Chemical Properties

Melting point	124-127 °C (dec.)(lit.)
Boiling point	355.3±25.0 °C(Predicted)
density	1.68
vapor pressure	0Pa at 25℃
refractive index	1.6550 (estimate)
storage temp.	2-8°C
solubility	27g/l
pka	2.40±0.10(Predicted)
form	Crystalline Powder
color	White
PH	4 (10g/l, H2O, 20℃)
Water Solubility	30 g/L (20 ºC)
Sensitive	Moisture Sensitive
BRN	506653
InChIKey	FYOWZTWVYZOZSI-UHFFFAOYSA-N
LogP	-3.37 at 25℃
CAS DataBase Reference	1758-73-2(CAS DataBase Reference)
EPA Substance Registry System	Methanesulfinic acid, aminoimino- (1758-73-2)

Safety Information

Hazard Codes	Xn,Xi
Risk Statements	5-22-36/37/38
Safety Statements	26-24/25-36
RIDADR	UN 3341 4.2/PG 2
WGK Germany	1
RTECS	PB0372500
TSCA	Yes
HazardClass	4.2
PackingGroup	II
HS Code	29309070

Product Application of Thiourea dioxide CAS#1758-73-2

As a reducing agent, thiourea dioxide is widely used in the printing and dyeing industry for wool bleaching, dyeing with vat dyes and sulphur dyes, reducing detergents for disperse dyeing, and discharge decolorants. In organic synthesis, it is used to reduce ketones, quinones, nitro, azo, azoxy, azoxy, sub-azo compounds and organic sulfides. Thiourea dioxide is also used as various decolorizing agents, a sensitizer for photographic latex, a chemical reagent for separating rare metals rhodium and iridium, and can improve the stability of polyethylene. Adding thiourea dioxide to the evaporation process of polyacrylonitrile and polymerization can improve the color of polyacrylonitrile, and is an important supporting product for synthetic fiber production. This product is also widely used in the production of fine chemical products such as medicines and spices.

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