Urea (57-13-6)
Basic Information
Chemical Name: Urea
Chinese Aliases: Carbamide; Carbonyl Diamide
English Name: Urea
Molecular Formula: CH₄N₂O
Molecular Weight: 60.06
CAS Number: 57-13-6
EINECS Number: 200-315-5
Appearance: White crystalline granules or powder, odorless, easily soluble in water, slightly soluble in alcohol, insoluble in ether, stable in air, with good water solubility and thermal stability.
Technical Parameters
Table 1: Requirements for Agricultural (Fertilizer) Urea %
Item | Grade | Premium | Qualified
Total Nitrogen (N) Mass Fraction ≥ | 46.0 | 45.0
Biuret Mass Fraction ≤ | 0.9 | 1.5
Moisture ≤ | 0.5 | 1.0
Methylenediurea (calculated as HCHO) Mass Fraction ≤ | 0.6 | 0.6
Particle Size | d 0.85 mm–2.80 mm ≥ | 93% (Premium) / 90% (Qualified)
d 1.18 mm–3.35 mm ≥ |
D 2.00 mm–4.75 mm ≥ |
D 4.00 mm–8.00 mm ≥ |
Table 2: Requirements for Industrial Urea %
Item | Grade | Premium | Qualified
Total Nitrogen (N) Mass Fraction ≥ | 46.4 | 46.0
Biuret Mass Fraction ≤ | 0.5 | 1.0
Moisture ≤ | 0.3 | 0.7
Iron (as Fe) Mass Fraction ≤ | 0.0005 | 0.0010
Alkalinity (as NH₃) Mass Fraction ≤ | 0.01 | 0.03
Sulfate (as SO₄²⁻) Mass Fraction ≤ | 0.005 | 0.020
Water-Insoluble Matter Mass Fraction ≤ | 0.005 | 0.040
(The above parameters are for reference only; please refer to the factory inspection certificate for exact values.)
Packaging Specifications
Standard packaging is 40–50 kg woven bags lined with plastic film or 1000 kg jumbo bags. Smaller packages can also be customized according to customer requirements.