White and shiny crystal. Bitter taste. The density of 1.405. The melting point of 180 ~ 182 ℃. More thermal decomposition. When heated to dissolve in water, soluble in ethanol, very slightly soluble in ether. When molten partly on isomerization and form than ammonium thiocyanate. Used in the manufacture of the drug, dye, resin, such as molding powder of raw material, also used as rubber vulcanization accelerator, metallic minerals flotation agent and so on. By hydrogen sulfide and lime sulfur into calcium hydroxide, cyanogen amine (base) to the calcium role again. Ammonium rhodanide melting will also be making, or will cyanamid and hydrogen sulfide.
Appearance and properties: white light bitter crystals. Melting point (℃) : 176 ~ 178 Relative density (water = 1) : 1.41 Boiling point (℃) : decomposition Molecular formula: CH4N2S Molecular weight: 76.12 Octanol/water partition coefficient of value: 2.5 Solubility: soluble in cold water, ethanol, slightly soluble in ether. [2] Chemical properties Flame, high combustible. Thermal decomposition and released the oxides of nitrogen, sulfur, toxic gases. Strong reaction can occur with antioxidants. [2] 3 role and purpose Used to synthesize sulfathiazole, methionine and pig drugs such as raw materials. Used as dye and dyeing auxiliaries, resin and molding compound materials. Also can be used as a rubber vulcanization accelerator, metallic minerals flotation agent, phthalic anhydride and fumaric acid catalyst, and used for metal rust remover. In terms of photographic materials, can be used as a developer and toner. Can also be used in electroplating industry. Thiourea is also used in diazo sensitive paper, synthetic resin coating, anion exchange resin, germination promoting agent, fungicide