Urea is a white granular solid used in agriculture as a fertilizer, chemical industry, explosives, diesel exhaust fluid (DEF, a.k.a. AdBlue) and other niche uses. More than 90% of world industrial production of urea is destined for use as a nitrogen-release fertilizer. Urea has the highest nitrogen content of all solid nitrogenous fertilizers in common use. Therefore, it has the lowest transportation costs per unit of nitrogen nutrient. The standard crop-nutrient rating (NPK rating) of urea is 46-0-0. The current industrial synthesis of urea is called the Bosch–Meiser urea process. The first step is a exothermic reaction of liquid ammonia with gaseous carbon dioxide at high temperature and pressure to form ammonium carbamate. The second step is the slower endothermic decomposition of ammonium carbamate into urea and water. Urea can also be produced by the reaction of phosgene with ammonia to produce urea and ammonium chloride. Urea was first produced in 1828 by the german chemist Friedrich Wöhler by by treating silver cyanate with ammonium chloride, to produce urea and silver chloride. This was the first time an organic compound was artificially synthesized from inorganic starting materials, without the involvement of living organisms.
DOT Classification: Not Hazardous/ No UN ID.
Тип: product