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Thiourea dioxide

CAS No.1758-73-2
Chemical Name:Thiourea dioxide
CBNumber:CB7761108
Molecular Formula:CH4N2O2S
Formula Weight:108.12
MOL File:1758-73-2.mol

Thiourea dioxide Property

Melting point 124-127 °C (dec.)(lit.)
Boiling point 355.3±25.0 °C(Predicted)
Density 1.68
bulk density 850kg/m3
vapor pressure 0Pa at 25℃
refractive index 1.6550 (estimate)
storage temp. 2-8°C
solubility 27g/l
form Crystalline Powder
pka 2.40±0.10(Predicted)
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)
FDA UNII 42BWR07L73
EPA Substance Registry System Methanesulfinic acid, aminoimino- (1758-73-2)
UNSPSC Code 12352106
NACRES NA.22

Safety

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

NFPA 704:

	3
2		3

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal wordDanger
Hazard statements H251-H302-H315-H318-H330-H335-H373
Precautionary statements P235-P280-P301+P312+P330-P304+P340+P310-P305+P351+P338+P310-P314

Thiourea dioxide Price More Price(6)

Brand: Sigma-Aldrich(India)
Product number: F16001
Product name : Formamidinesulfinic acid
Purity: ≥98%
Packaging: 100G
Price: ₹2035.1
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 8.20082
Product name : Aminoiminomethanesulfinic acid
Purity: for synthesis
Packaging: 250G
Price: ₹6500.01
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich
Product number: 8.20082
Product name : Aminoiminomethanesulfinic acid
Purity: for synthesis
Packaging: 1KG
Price: ₹12400
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 8.20082
Product name : Aminoiminomethanesulfinic acid
Purity: for synthesis
Packaging: 1KG
Price: ₹12400
Updated: 2022/06/14
Buy: Buy

Brand: TCI Chemicals (India)
Product number: F0115
Product name : Formamidinesulfinic Acid
Purity:
Packaging: 25G
Price: ₹2200
Updated: 2022/05/26
Buy: Buy

Thiourea dioxide Chemical Properties,Usage,Production

Chemical Properties white crystalline powder
Uses Convenient reagent for the reduction of ketones to secondary alcohols.
Thiourea dioxide is an effective bleach when used alone or when used after hydrogen peroxide in a full bleaching process (Duffield, 1986; Cegarra et al, 1988). Bleaching with thiourea dioxide is not common practice but it is effective when used alone, and the process compares favorably with hydrogen peroxide bleaching. A formulation can include a commercial thiourea dioxide product, wetting agent and EDTA sequestering agent. Reductive bleaching is carried out at pH 7.0 at 70°C for 60 min (Duffield, 1986).
General Description A white or light-yellow odorless crystalline powder. Mp:126°C. Soluble in water (27 g / L at room temperature). Decomposes exothermically at temperatures above 126°C with the emission of noxious gases (sulfur oxides, ammonia, carbon monoxide, nitrogen oxides and hydrogen sulfide) and carbon dioxide. Extended exposure to temperatures above 50°C and moisture may cause visible decomposition. Irritating to skin and mucous membranes. Corrosive to eye tissue. Used in leather processing, the paper industry, photographic industry, and in textile processing as a bleaching agent.
Air & Water Reactions Soluble in water
Reactivity Profile Thiourea dioxide is a reducing agent and a derivative of sulfinic acid (a weak inorganic acid). Decolorizes and bleaches materials by chemical reduction. Stable under normal temperatures and pressures. May decompose on exposure to moist air or water. Incompatible with strong oxidizing agents, strong bases. Aqueous solutions are acidic and corrosive.
Health Hazard Fire will produce irritating, corrosive and/or toxic gases. Inhalation of decomposition products may cause severe injury or death. Contact with substance may cause severe burns to skin and eyes. Runoff from fire control may cause pollution.
Fire Hazard Flammable/combustible material. May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. Some react vigorously or explosively on contact with water. Some may decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished. Runoff may create fire or explosion hazard. Containers may explode when heated.
Flammability and Explosibility Non flammable
reaction suitability reagent type: reductant
Purification Methods Dissolve it in five parts of aqueous 1:1% NaHSO3 at 60-63o (charcoal), then allow it to crystallise slowly, with agitation, at 10o. Filter and dry it immediately at 60o [Koniecki & Linch Anal Chem 30 1134 1958]. [Beilstein 3 I 36, 3 IV 145.]