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Product Properties
Urea, also known as carbamide, is the final product of protein metabolism in humans and mammals, and it is also a primary organic nitrogen compound excreted by animals. The pure substance appears as white granular, needle-like, or prismatic crystals; when mixed with heavy metals such as iron, it may turn light red or yellow. It is odorless and tasteless, readily soluble in water, ethanol, and benzene, but sparingly soluble in ether and chloroform. At 20°C, 100 kilograms of water can dissolve 105 kilograms of urea, with heat absorption during dissolution. Its aqueous solution exhibits a neutral reaction. The nitrogen content of pure urea is 46.65%, while agricultural urea contains 42% to 46% nitrogen, with a small amount of biuret (generally less than 2%), which is typically harmless to crop growth. Urea has a low specific gravity and bulk density, with a weight of 0.65 tons per cubic meter of the fertilizer.
Quality index
| Melting point | 132-135 °C(lit.) |
| Boiling point | 332.48°C (estimate) |
| density | 1.335 g/mL at 25 °C(lit.) |
| bulk density | 720-760kg/m3 |
| vapor pressure | <0.1 hPa (20 °C) |
| refractive index | n20/D 1.40 |
| storage temp. | 2-8°C |
| solubility | H2O: 8 M at 20 °C |
| form | powder |
| pka | 0.10(at 25℃) |
| color | white |
| Specific Gravity | 1.335 |
| Odor | almost odorless |
| PH | 8.0-10.0 (20℃, 8M in H2O) |
| biological source | synthetic |
| Water Solubility | 1080 g/L (20 ºC) |
| λmax | λ: 260 nm Amax: 0.03 λ: 280 nm Amax: 0.02 |
| Merck | 14,9867 |
| BRN | 635724 |
| Dielectric constant | 3.5（Ambient） |
| Stability: | Substances to be avoided include strong oxidizing agents. Protect from moisture. |
| InChIKey | XSQUKJJJFZCRTK-UHFFFAOYSA-N |
| LogP | -1.660 (est) |
| CAS DataBase Reference | 57-13-6(CAS DataBase Reference) |
| NIST Chemistry Reference | Urea(57-13-6) |
| EPA Substance Registry System | Urea (57-13-6) |
| Absorption | ≤0.06 at 260nm at 5M ≤0.06 at 280nm at 5M |
Application
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.
In the soil, it hydrolyses back to ammonia and carbon dioxide. The ammonia is oxidized by bacteria in the soil to nitrate, which can be absorbed by the plants. Urea is also used in many multi-component solid fertilizer formulations. Urea is highly soluble in water, therefore, very suitable for use in fertilizer solutions (in combination with ammonium nitrate: UAN), e.g., in ‘foliar feed’ fertilizers. For fertilizer use, granules are preferred because of their narrower particle size distribution, an advantage for mechanical application. The most common impurity of synthetic urea, biuret, must be present at less than 2 percent of the time, as it impairs plant growth.
Packing
1000kg/bag，50kg/bag，1200kg/bag,or the other according to your need.