Prilled Urea
Also known as: Prilled Urea 46-0-0, Urea Prills Chemical Formula: CO(NH₂)₂ Standard Grade: 46-0-0
Prilled Urea is a high-nitrogen fertilizer containing 46% nitrogen, the highest concentration among common solid nitrogen fertilizers. It is produced by spraying molten urea into a cooling tower (prilling process), forming small, nearly spherical particles (prills).
Chemically identical to granular urea, prilled urea differs mainly in particle size and physical characteristics. Its smaller size results in faster dissolution and quicker nitrogen availability, making it suitable for applications where rapid nutrient release is desired.
Technical Specifications
| Parameter | Unit | Typical / Standard Value |
|---|---|---|
| Total Nitrogen (N) | % | 46.0 min (typically 46.0–46.3) |
| Biuret | % | ≤ 1.0 |
| Moisture | % | ≤ 0.5 |
| Particle Size | mm | 1.0–3.0 / 1.0–4.0 (≥ 90% in range) |
| Appearance | — | White free-flowing prills |
| Bulk Density (approx.) | kg/m³ | Slightly lower than granular |
| Free Ammonia | ppm | ≤ 160 |
| Anti-caking Treatment | — | Usually present |
Typical Physical Properties
- Smaller and more spherical than granular urea
- Faster dissolution in soil moisture
- Highly water-soluble
- Free-flowing when properly treated against caking
- Suitable for direct application and certain blending uses
Key Benefits
- Highest nitrogen content (46% N) — highly concentrated and cost-effective per unit of nitrogen.
- Faster nutrient release — Smaller particle size allows quicker dissolution and more rapid nitrogen availability compared with granular urea.
- Versatile and economical — Suitable for a wide range of crops and application methods.
- Easy handling — Free-flowing prills support efficient spreading and packaging.
- Proven performance — One of the most widely used nitrogen sources in global agriculture.
Comparison with Granular Urea:
- Prilled: Smaller particles, faster dissolution, often preferred for quick-response applications.
- Granular: Larger, harder particles, better for bulk blending and mechanical spreading over longer distances; slightly slower release.
Recommended Applications
Highly suitable for:
- Cereals (wheat, rice, maize), sugarcane, cotton, and most field crops
- Situations requiring relatively rapid nitrogen availability
- Direct soil application (broadcast or banded)
- Pasture top-dressing
- Certain industrial uses (resins, adhesives, etc.)
Application Methods:
- Broadcast or banded into the soil
- Applied before or during periods of active growth
- Incorporated or applied before rainfall/irrigation to minimize ammonia volatilization
- Can be used in blends (particle size compatibility should be considered)
Best Practices:
- Apply to moist soil or incorporate lightly to reduce nitrogen losses.
- Match rates to soil tests and crop demand.
- Low-biuret grades are preferred for foliar or sensitive crop applications.
Packaging Options
- 50 kg moisture-resistant bags
- 500–1,000 kg jumbo bags (FIBC)
- Bulk (loose) delivery for large-scale use
Storage & Handling Recommendations
- Store in a cool, dry, well-ventilated warehouse protected from moisture.
- Keep bags sealed and stacked on pallets to prevent caking.
- Avoid contact with ammonium nitrate and strong oxidizers.
- Use standard personal protective equipment; urea dust may cause mild irritation.
Summary
Prilled Urea (46-0-0) is a high-analysis, fast-dissolving nitrogen fertilizer ideal for applications requiring relatively quick nutrient availability. Its smaller particle size and rapid solubility distinguish it from granular urea, while delivering the same high nitrogen content and cost efficiency that make urea the world’s leading solid nitrogen fertilizer.
For commercial inquiries, current availability, low-biuret grades, or technical data sheets, please contact us.
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