Overview
Diammonium Phosphate (DAP) is a granular, water-soluble fertilizer with a nutrient composition of 18% nitrogen (N) and 46% phosphorus pentoxide (P₂O₅), making it one of the most concentrated phosphate-based fertilizers available. It provides a balanced supply of nitrogen and phosphorus, essential for early plant development, root establishment, and overall crop productivity.

Technical Characteristics

• Chemical Formula: (NH₄)₂HPO₄
• Appearance: Grey to dark brown granules, free-flowing
• Nutrient Content:
  • Nitrogen (N): 18% min.
  • Phosphorus (P₂O₅): 46% min. (water-soluble)
• Moisture Content: ≤ 2% by weight
• Granule Size: 90% between 2–4 mm
• Bulk Density: 0.95–1.05 g/cm³
• pH (1% solution): 7.5–8.5
• Solubility in Water: 100% (at 25°C, ~57 g/100 mL water)

Specifications & Standards

• Manufactured according to FAO/WHO fertilizer standards
• Meets ISO 17323 and regional fertilizer quality specifications
• Available in agricultural grade for direct application or blending

Applications

• Agriculture:
  • Used as a starter fertilizer to supply phosphorus during early crop growth
  • Suitable for cereals, grains, oilseeds, fruits, vegetables, and cash crops
  • Can be applied by broadcasting, banding, or fertigation
• Blending: Compatible with other granular fertilizers in NPK formulations
• Industrial Use: Intermediate in the production of fire retardants, yeast nutrients, and specialty chemicals

Performance Advantages

• High Phosphorus Availability: Promotes strong root development and early plant vigor
• Balanced Nutrition: Provides both nitrogen (for growth) and phosphorus (for energy transfer and photosynthesis)
• High Solubility: Ensures rapid nutrient release and uptake
• Versatility: Suitable for a wide range of soils and crops

Handling & Storage

• Hygroscopic: Must be stored in dry, cool, and well-ventilated conditions
• Avoid direct contact with moisture to prevent caking and lump formation
• Use corrosion-resistant equipment for handling and storage
• Shelf life: 12–24 months under proper storage conditions

Compliance & Testing

• Tested for nitrogen content, phosphorus solubility, particle size, and moisture (per AOCS, ISO, and AOAC methods)
• Supplied with third-party Quality & Quantity (Q&Q) inspection certificates (SGS, Intertek, CIQ)

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