Diammonium Phosphate (DAP) Product Introduction
Diammonium phosphate (DAP) is a highly efficient compound fertilizer widely used in agriculture. Below is an introduction covering its basic information, physical and chemical properties, production process, product characteristics, agricultural applications, and usage precautions.
Basic Information
Name: Diammonium Phosphate (DAP)
Chemical Formula: (NH₄)₂HPO₄
Molecular Weight: 132.06
Also Known As: DAP fertilizer, diammonium hydrogen phosphate
Physical and Chemical Properties
Appearance: White to light yellow crystals or granules with good flowability.
Solubility: Highly soluble in water (~70 g per 100 mL at 20°C).
Hygroscopicity: Moderately hygroscopic; may absorb moisture in humid conditions but is less prone to caking compared to some other fertilizers.
Acidity/Alkalinity: The aqueous solution is slightly alkaline (pH ~7.8–8.2).
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Parameter
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Specification
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Total Nitrogen
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18%min
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Available P2O5
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46%min
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Water Soluble phosphorus in available P2O5
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87%min
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Moisture
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2.5%max
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Parameter
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Specification
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Bulk density (Loose)
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58 lb/ft3 or 897 kg/m3
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Bulk density (Packed)
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60 lb/ft3 or 961 kg/m3
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Angle of repose, degrees
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31-33
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Size Guide Number (SGN)
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260 – 300
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Uniformity Index (UI)
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>50
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Size
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2-4mm
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Color
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Dark Brown,light brown, yellow
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