Overview
Thiourea is an organosulfur compound with the formula CH4N2S. It is structurally similar to urea, but with sulfur replacing oxygen. The compound is widely used in industrial applications due to its ability to form complexes with metals and its reducing properties. Thiourea is produced industrially by the reaction of hydrogen sulfide with calcium cyanamide. It is a versatile chemical with applications ranging from photography to pharmaceuticals, making it a valuable commodity in the B2B market.
Physical and Chemical Properties
Thiourea appears as a white crystalline powder with a density of 1.405 g/cm³. It has a melting point of 176-178°C and decomposes before reaching a boiling point. The compound is soluble in water, ethanol, and ammonia, which makes it useful in various industrial processes. Chemically, thiourea is known for its ability to reduce metal ions and form stable complexes with metals like gold and silver. This property is particularly useful in metal extraction and electroplating industries. Additionally, it can act as a sulfur donor in organic synthesis.
Main Applications
Thiourea is extensively used in the photography industry as a fixing agent due to its ability to dissolve silver halides. In pharmaceuticals, it serves as an intermediate in the synthesis of various drugs, including antithyroid medications. The compound is also employed in metal extraction processes, where it helps in the recovery of precious metals like gold and silver from ores. Other applications include its use as a vulcanization accelerator in rubber production and as a corrosion inhibitor in industrial cooling systems.
Safety and Storage
Thiourea is classified as harmful if swallowed and may cause skin and eye irritation. Proper personal protective equipment (PPE), such as gloves and goggles, should be worn when handling the compound. Storage should be in a cool, dry, well-ventilated area away from oxidizing agents. Containers must be tightly sealed to prevent moisture absorption and contamination. In case of spills, neutralize with a suitable chemical absorbent and dispose of in accordance with local regulations.
B2B Procurement Guide
When procuring thiourea, B2B buyers should prioritize suppliers who provide detailed product specifications, including purity levels and potential impurities. Certifications such as ISO or GMP can indicate a reliable supplier. Bulk purchases often come with cost advantages, but storage conditions must be considered to prevent degradation. Buyers should also inquire about packaging options, such as moisture-resistant bags or drums, to ensure product integrity during transit and storage.
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