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Basic Information
| CAS No.: | 1758-73-2 |
|---|---|
| Name: | Thiourea dioxide |
| Molecular Structure: | |
|
|
|
| Formula: | CH4N2O2S |
| Molecular Weight: | 108.121 |
| Synonyms: | AIMSA;Methanesulfinic acid,aminoimino-;amino-imino-methanesulfinic acid;Methanesulfinic acid, aminoimino-;Methenesulfinic acid, aminoimino-;Thiourea Dioxide(Formamidinesulfinic acid);aminoiminomethanesulphinic acid;Formamidinesulphinic acid;99%Thiourea dioxide(Antioxidants); |
| EINECS: | 217-157-8 |
| Density: | 2.25 g/cm3 |
| Melting Point: | 124-127 °C (dec.)(lit.) |
| Boiling Point: | 355.3 °C at 760 mmHg |
| Flash Point: | 168.7 °C |
| Solubility: | water: 30 g/L (20 °C) |
| Appearance: | white crystalline powder |
| Hazard Symbols: |
 Xn, Xi
|
| Risk Codes: | 5-22-36/37/38 |
| Safety: | 26-24/25-36 |
| Transport Information: | UN 3341 4.2/PG 2 |
| PSA: | 106.38000 |
| LogP: | 0.76730 |
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Synthetic route
- 17356-08-0
thiourea
- 1758-73-2
Aminoiminomethanesulfinic acid
Conditions
| Conditions | Yield |
|---|---|
| With peracetic acid In methanol; water at 10℃; | 86% |
| With dihydrogen peroxide In water at 8 - 10℃; for 1.5h; | 75% |
| With dihydrogen peroxide at 8 - 15℃; for 3h; pH=3 - 5; | 57.3% |
Conditions
| Conditions | Yield |
|---|---|
| je nach den Mengenverhaeltnissen; |
...Expand
Conditions
| Conditions | Yield |
|---|---|
| With water; dihydrogen peroxide at 10 - 30℃; |
- 14807-75-1
formamidine disulfide dihydrochloride
- 1758-73-2
Aminoiminomethanesulfinic acid
Conditions
| Conditions | Yield |
|---|---|
| With ammonium hydroxide; ammonium molybdate tetrahydrate; dihydrogen peroxide |
...Expand
...Expand
...Expand
- 17356-08-0
thiourea
- 1758-73-2
Aminoiminomethanesulfinic acid
Conditions
| Conditions | Yield |
|---|---|
| at 0℃; |
- 7732-18-5
water
- 7722-84-1
dihydrogen peroxide
- 17356-08-0
thiourea
A
- 3256-06-2
formamidine disulfide
B
- 1758-73-2
Aminoiminomethanesulfinic acid
Conditions
| Conditions | Yield |
|---|---|
| vom pH 7.4; |
...Expand
- 3256-06-2
formamidine disulfide
A
- 505-14-6
thiocyanogen
B
- 1184-90-3
aminoiminomethanesulfonic acid
C
- 1758-73-2
Aminoiminomethanesulfinic acid
D
- 17356-08-0
thiourea
E
- 57-13-6
urea
Conditions
| Conditions | Yield |
|---|---|
| With water; dihydrogen peroxide at 25℃; pH=2; Kinetics; pH-value; |
...Expand
Raw Materials
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Thiourea dioxide
Chemistry
Synonyms: FAS PRIMER PAIR;FASTECH;FORMAMIDINESULFINIC ACID;FORMAMIDINESULPHINIC ACID;AMIDINOSULFINIC ACID;AMINOIMINOMETHANESULFINIC ACID;Methanesulfinicacid,aminoimino-; aminoimino-methanesulfinicaci;
Molecular formula:CH4N2O2S
Molecular Weight: 108.12
Molecular Structure:
EINECS: 217-157-8
Melting point:124-127 °C (dec.)(lit.)
density:1.68
Water Solubility:30 g/L (20 oC)
Storage Temp.:2-8°C
Molecular formula:CH4N2O2S
Molecular Weight: 108.12
Molecular Structure:
EINECS: 217-157-8
Melting point:124-127 °C (dec.)(lit.)
density:1.68
Water Solubility:30 g/L (20 oC)
Storage Temp.:2-8°C
Uses
Thiourea dioxide (TDO) is a strong reductant which re-arranges under alkaline conditions to form formamidine sulphinic acid. This product is used in leather processing industry, paper, pulp and board industry, photographic industry, textile processing industry, bleaching and reducing agents. This product is also a component of decolorisation agents. TDO has been very effective on a wide variety of pulp sources as a reductive bleaching aid in the pulp and paper industry. The application of TDO is crucial to achieve optimal brightness gain in the deinking process.
Safety Profile
Hazard Codes: 
Xn,Xi
The Risk Statements information of THIOUREA DIOXIDE:
5: Heating may cause an explosion
22: Harmful if swallowed
36/37/38: Irritating to eyes, respiratory system and skin
The Safety Statements information of THIOUREA DIOXIDE:
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36: Wear suitable protective clothing
24/25: Avoid contact with skin and eyes
RIDADR:UN 3341 4.2/PG 2
WGK Germany:1
Xn,Xi The Risk Statements information of THIOUREA DIOXIDE:
5: Heating may cause an explosion
22: Harmful if swallowed
36/37/38: Irritating to eyes, respiratory system and skin
The Safety Statements information of THIOUREA DIOXIDE:
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36: Wear suitable protective clothing
24/25: Avoid contact with skin and eyes
RIDADR:UN 3341 4.2/PG 2
WGK Germany:1