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Thiourea 99% (China Origin)

Thiourea 99% (China Origin)
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Country Origin : China Appearence : White Solid
CAS No. : 62-56-6 H.S. Code : 2930.90.10
Formula : CH4N2S Common Names : N,N-diethylthiourea
IUPAC Name : Thiourea
Packaging : 800 @ 25 kg Woven Bags, 20 MT / 20’FCL
  • Description
  • Application
Brief Overview

 

Thiourea is an organosulfur compound with the formula, CH4N2S. Thiourea is the white crystalline solid available naturally and synthetically and is soluble in water and polar organic solvents. It has properties very different to that of urea even though their structures are very similar, with a sulfur atom instead of an oxygen atom. On decomposition, it emits toxic fumes of nitrogen and sulphur oxide.Long-term exposure to thiourea causes bone marrow damage, reduces blood cells.

 

 

Manufacturing Process

 

Thiourea is manufactured in a closed system using calcium cyanamide and hydrogen sulfide. The reaction vessel is charged continuously with an aqueous suspension of calcium cyanamide and a mixture of hydrogen sulfide and carbon dioxide. Excess hydrogen sulfide is removed by stripping and thiourea solution is filtered to remove precipitated calcium carbonate. The filtrate is then evaporated on a rotary evaporator and thiourea is crystallized on cooling. 

 



Textile Industry

 

Thiourea can be used to manufacture thiourea dioxide, which is used in textile dyes, synthetic organic dyes for cellulosics. Sulfur dyes work using an oxidation-reduction dyeing method and a common reduction agent used is sodium hydrosulfite. However, sodium hydrosulfite is poor in preserving stability and undergoes oxidative decomposition at a faster rate compared to thiourea dioxide. In addition, hydrosulfite produces a bad smelling gas, therefore, making thiourea dioxide a better option and choice as reducing agent.