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Thiourea dioxide

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Thiourea dioxide Basic information

Product Name:
Thiourea dioxide
CAS:
1758-73-2
MF:
CH4N2O2S
MW:
108.12
EINECS:
217-157-8
Mol File:
1758-73-2.mol
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Thiourea dioxide Chemical Properties

Melting point:
124-127 °C (dec.)(lit.)
Boiling point:
355.3±25.0 °C(Predicted)
Density 
1.68
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
CAS DataBase Reference
1758-73-2(CAS DataBase Reference)
EPA Substance Registry System
Methanesulfinic acid, aminoimino- (1758-73-2)
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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

MSDS

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Thiourea dioxide Usage And Synthesis

Chemical Properties

white crystalline powder

Uses

Convenient reagent for the reduction of ketones to secondary alcohols.

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.

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.]

Thiourea dioxide Preparation Products And Raw materials

Raw materials

Preparation Products

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Thiourea dioxideSupplierMore

Changzhou Bestar Industry Co.,Ltd. Gold
Tel:
0519-82309982
Email:
Lucy@bestarchem.net
J & K SCIENTIFIC LTD.
Tel:
010-82848833- ;010-82848833-
Email:
jkinfo@jkchemical.com;market6@jkchemical.com
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel:
+86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
Email:
sh@meryer.com
Alfa Aesar
Tel:
400-610-6006; 021-67582000
Email:
saleschina@alfa-asia.com
TCI (Shanghai) Development Co., Ltd.
Tel:
021-67121386 / 800-988-0390
Email:
Sales-CN@TCIchemicals.com
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