Thiourea dioxide
- CAS No.
- 1758-73-2
- Chemical Name:
- Thiourea dioxide
- Synonyms
- FORMAMIDINESULFINIC ACID;AMINOIMINOMETHANESULFINIC ACID;Thiurea dioxide;Thiourea S,S-dioxide;FORMAMIDINESULPHINIC ACID;aminoimino-methanesulfinicaci;FASTECH;Amino(imino);FAS PRIMER PAIR;Tiourea dioxide
- CBNumber:
- CB7761108
- Molecular Formula:
- CH4N2O2S
- Molecular Weight:
- 108.12
- MDL Number:
- MFCD00002397
- MOL File:
- 1758-73-2.mol
- MSDS File:
- SDS
| 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 |
| Cosmetics Ingredients Functions | REDUCING |
| InChI | 1S/CH4N2O2S/c2-1(3)6(4)5/h(H3,2,3)(H,4,5) |
| InChIKey | FYOWZTWVYZOZSI-UHFFFAOYSA-N |
| SMILES | NC(=N)S(O)=O |
| 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
Risk and Safety Statements
| Symbol(GHS) |     GHS02,GHS05,GHS06,GHS08 |
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|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H251-H302-H315-H318-H330-H335-H373 | |||||||||
| Precautionary statements | P235-P280-P301+P312+P330-P304+P340+P310-P305+P351+P338+P310-P314 | |||||||||
| target organs | Lungs, Respiratory system | |||||||||
| PPE | dust mask type N95 (US), Eyeshields, Gloves | |||||||||
| Hazard Codes | Xn,Xi | |||||||||
| Risk Statements | 5-22-36/37/38 | |||||||||
| Safety Statements | 26-24/25-36 | |||||||||
| RIDADR | UN 3341 4.2/PG II/III (THIOUREA DIOXIDE) | |||||||||
| WGK Germany | 1 | |||||||||
| RTECS | PB0372500 | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | 4.2 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 29309070 | |||||||||
| Storage Class | 4.2 - Pyrophoric and self-heating hazardous materials | |||||||||
| Hazard Classifications | Acute Tox. 2 Inhalation Acute Tox. 4 Oral Eye Dam. 1 Self-heat. 1 Skin Irrit. 2 STOT RE 2 STOT SE 3 |
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| REACH Registrations | Active | |||||||||
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml) | |||||||||
| NFPA 704 |
|
Thiourea dioxide price More Price(28)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | F16001 | Formamidinesulfinic acid ≥98% | 1758-73-2 | 100g | $86.5 | 2026-04-30 | Buy |
| Sigma-Aldrich | 8.20082 | Aminoiminomethanesulfinic acid for synthesis | 1758-73-2 | 250g | $89.7 | 2026-04-30 | Buy |
| Sigma-Aldrich | 8.20082 | Aminoiminomethanesulfinic acid for synthesis | 1758-73-2 | 1kg | $199 | 2026-04-30 | Buy |
| TCI Chemical | F0115 | Formamidinesulfinic Acid >93.0%(T) | 1758-73-2 | 25g | $39 | 2026-04-30 | Buy |
| TCI Chemical | F0115 | Formamidinesulfinic Acid >93.0%(T) | 1758-73-2 | 500g | $236 | 2026-04-30 | Buy |
Thiourea dioxide Chemical Properties, Uses, 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.]
Thiourea dioxide Preparation Products And Raw materials
Raw materials
1of2
Preparation Products
1of2
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| JinJin Le Chemical Co., Ltd | 18001959627(微信同号) 18001959627 | jjlchem2@163.com | China | 9890 | 58 |
| Hubei Honghan Biotech Co., Ltd | 0719-0719-7199239 15675290733 | 121628410@qq.com | China | 21 | 58 |
| Jinan Feiyue Chemical Co., Ltd | 18615221057 | 913474026@qq.com | China | 129 | 58 |
| Shandong Elito Biotechnology Co., Ltd | 0539-18853986-090 13053958157 | 332554317@qq.com | China | 104 | 58 |
| JenenChemical(Shandong)Co.,Ltd | 00-00-17861750229 17861750229 | 294813132@qq.com | China | 66 | 58 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
| TCI (Shanghai) Development Co., Ltd. | 021-67121386 | Sales-CN@TCIchemicals.com | China | 24512 | 81 |
| Capot Chemical Co., Ltd | +86 (0) 571 85 58 67 18 | China | 18187 | 66 |
View Latest Price from Thiourea dioxide manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-16 | Thiourea dioxide
1758-73-2
|
0.99 | RongNa Biotechnology Co.,Ltd | ||||
 |
2026-09-16 | Thiourea dioxide
1758-73-2
|
$75.00-100.00 | 1kg | 99% | 5000 | HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD | |
 |
2026-08-21 | Thiourea dioxide
1758-73-2
|
$60.00-70.00 | 1kg | 99% | 20Tons | Hebei Dangtong Import and export Co LTD |
-
- Thiourea dioxide
1758-73-2
- 0.99
- RongNa Biotechnology Co.,Ltd
-
- Thiourea dioxide
1758-73-2
- $75.00-100.00
- 99%
- HEBEI SHENGSUAN CHEMICAL INDUSTRY CO.,LTD
-
- Thiourea dioxide
1758-73-2
- $60.00-70.00
- 99%
- Hebei Dangtong Import and export Co LTD
