Urea, also known as carbamide, has the chemical formula CH4N2O. It is an organic compound composed of carbon, nitrogen, oxygen, and hydrogen. It is a white crystal.
Urea is a high-concentration nitrogen fertilizer, a neutral quick-acting fertilizer, and can also be used to produce a variety of compound fertilizers. Urea is suitable for base fertilizer and top dressing, and sometimes as seed fertilizer.
As a neutral fertilizer, urea is suitable for various soils and plants. It is easy to store, easy to use, and has little damage to the soil. It is a chemical nitrogen fertilizer that is currently used in a large amount. In industry, ammonia and carbon dioxide are used to synthesize urea under certain conditions.
Quality Standard
| Test Items | Agricultural Quality Index | ||
| High-class | Qualified | ||
| Color | White | White | |
| Total Nitrogen（In dry basis） ≥ | 46.0 | 45.0 | |
| Biuret %≤ | 0.9 | 1.5 | |
| Water（H2O） % ≤ | 0.5 | 1.0 | |
| Methylene diurea（in HCHO basis） % ≤ | 0.6 | 0.6 | |
| Particle size | d0.85mm-2.80mm ≥
d1.18mm-3.35mm ≥ d2.00mm-4.75mm ≥ d4.00mm-8.00mm ≥ |
93 | 90 |
| The product implementation standard is GB/T2440-2017 | |||
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