THIOUREA

Technical Grade

Thiourea is an organic compound that resembles urea but contains sulfur instead of oxygen; i.e., the molecular formula is CS(NH₂)₂, while that of urea is CO(NH₂)₂. Like urea, it can be prepared by causing a compound with the same chemical composition to undergo rearrangement, as by heating ammonium thiocyanate (NH₄SCN).

A method of preparation more commonly used consists of the addition of hydrogen sulfide to cyanamide. Thiourea exhibits many of the chemical properties of urea, but it has little commercial application. Thiourea is used chiefly in photography, inorganic synthesis, and to accelerate the vulcanization of rubber.

Uses of Thiourea:

• Silver Polishing:
• A lixiviant for gold and silver leaching can be created by selectively oxidizing thiourea, bypassing the steps of cyanide use and smelting
• Production of flame retardant resins
• Vulcanization accelerator
• Thiourea is used as an auxiliary agent in diazo paper (light-sensitive photocopy paper) and almost all other types of copy paper.

Properties of Thiourea:

• CAS Number: 62-56-6
• Molecular formula: CH₄N₂S
• Assay - 99% minimum
• Molar mass: 76.12 g/mol
• Appearance: white solid
• Density: 1.405 g/ml
• Melting point: 182 ^oC, 455 K, 360 ^oF
• Solubility in water: moderately soluble

PLEASE NOTE: This product is not for human or animal consumption.