Thiourea
Thiourea — CS(NH2)2 — a thiocarbamide, hydrazine of thiocoal acid.
Represents white crystals with bitter taste. Moderately a rastvorima in water, methanol, pyridine, it is good — in 50 percentage water pyridine. It is insoluble in ethyl oxide, benzene, CCl4.
Thiourea is received:
- interaction of H2S hydrogen sulfide with NH2CN cyanamide;
- ammonium thiocyanate heating to 170 °C;
- interaction of carbon sulfur with ammonia or a carbonate of ammonium at 160 °C.
Thiourea is applied to organic synthesis when receiving drugs, in synthesis thiofishing (merkaptan), dyes, synthetic pitches, to division of paraffin, a flotoagent, as reagent for photometric definition of Ru, Os, Re, Bi.
Also it is used in many pyrotechnic products: simulators of explosions, flashes, color smokes.
Thiourea possesses fungicide action.
Thiourea is poisonous. During the work with it it is necessary to protect open parts of a body and respiratory organs. At numerous impact on an organism oppresses functions of a thyroid gland, bodies of blood formation, reduces activity of a number of enzymes of tissue respiration.