High quality Urea CAS57-13-6 white powder

When the temperature of urea is below 20 ℃ and the relative humidity is below 70%, it will not only not absorb moisture, but also evaporate water and reduce its water content; When the temperature is more than 20 ℃ and the relative humidity is more than 80%, it will start to absorb moisture. When it is serious, it will become mushy. When the air turns dry again, it will agglomerate again, the degree is only second to ammonium nitrate. At 80 ℃, urea aqueous solution will undergo hydrolysis and decomposition reactions to form ammonium carbamate, ammonia gas and carbon dioxide respectively. Under acid and alkaline conditions, urea will decompose faster when it is heated. Urea is easy to combine with straight-chain carbohydrates to form crystalline additional compounds; It forms multiple complex salts such as Ca (NO3) 2 · 4CO (NH2) 2, NH4Cl · CO (NH2) 2, CaChemicalbookSO4 · 4CO (NH2) 2, MgSO4 · 4CO (NH2) 2 · 3H2O, Mg (NO3) · 4CO (NH2) 2 · 2H2O with various inorganic compounds; It is easy to form urea phosphate, dicalcium phosphate and water with monocalcium phosphate, namely Ca (H2PO4) 2 · H2O+CO (NH2) 2 → H3PO4 · CO (NH2) 2+CaHPO4+H2O; The reaction with nitric acid is easy to produce urea nitrate, CO (NH2) 2+HNO3 → CO (NH2) 2 · HNO3; It can combine with formaldehyde to form urea-formaldehyde compounds (uric acid gel), of which the high proportion of formaldehyde is urea resin, and the low proportion is slow-release (effective) urea