Thiourea dioxide

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

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.

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