Urea has an ammonia smell and a salty taste. When heatingtemperature is higher than its melting point, it is decomposedinto biuret, ammonia and cyanic acid. 1g soluble in 1mL water,10ml 95%ethanol, 1ml 95%boiling ethanol, 20mL anhydrousethanol, 6ml methanol and 2mL glycerol. Soluble in concentratedhydrochloric acid, almost insoluble in ether and chloroform.The pH of 10% aqueous solution is 7.23. Irritating.
Urea is used in analysis for antimony and tin. Determination oflead, calcium, copper, gallium, phosphorus, iodide and nitrate.Determination of blood urea nitrogen, with standard solution,determination of serum bilirubin. Separation of hydrocarbons.Nitric oxide and nitrous acid used to decompose nitrogen in theanalysis. Prepare the medium. Folin method for thedetermination of uric acid stabilizer, homogeneousprecipitation.
