Product Description of Diammonium Phosphate CAS#7783-28-0
Diammonium phosphate (DAP), also known as diammonium hydrogen phosphate, is a high-concentration compound fertilizer that supplies both nitrogen (18%) and phosphorus (48% P₂O₅). It is highly water-soluble, allowing rapid nutrient availability, and is suitable for a wide range of crops and soil types. DAP can be applied as either a base fertilizer or topdressing, with deep placement recommended for optimal performance.
Its saturated solution is mildly alkaline (pH 8), making it especially suitable for acidic soils. By reducing phosphorus fixation by iron and aluminum, DAP improves phosphorus availability and enhances nutrient uptake by crops.
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Diammonium Phosphate CAS#7783-28-0 Chemical Properties
| Melting point | 155 °C (dec.)(lit.) |
| density | 1.203 g/mL at 25 °C |
| vapor pressure | 0.076Pa at 20℃ |
| RTECS | TB9385000 |
| storage temp | -20°C |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| form | Powder |
| color | White |
| Specific Gravity | 1.619 |
| PH | 7.6-8.2 (100g/l, H2O, 20℃) |
| Odor | wh. cryst. or powd., odorless, cooling salty taste |
| Water Solubility | 58 g/ 100mL (10 ºC) |
| λmax | λ: 260 nm Amax: 0.065 λ: 280 nm Amax: 0.065 |
| Merck | 14,542 |
| Stability | Stable. Incompatible with strong acids, strong bases, strong oxidizing agents. |
| InChIKey | MNNHAPBLZZVQHP-UHFFFAOYSA-N |
| LogP | -2.148 (est) |
| CAS DataBase Reference | 7783-28-0(CAS DataBase Reference) |
| EPA Substance Registry System | Diammonium phosphate (7783-28-0) |
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Safety Information of Diammonium Phosphate CAS#7783-28-0
| Hazard Codes | Xi,Xn,N |
| Risk Statements | 36/37/38-20/21/22-50 |
| Safety Statements | 26-36-61-37/39 |
| RIDADR | UN 3465 6.1 / PGIII |
| WGK Germany | 1 |
| F | 3 |
| TSCA | Yes |
| HS Code | 31053000 |
| Hazardous Substances Data | 7783-28-0(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 6500 mg/kg LD50 dermal Rabbit > 7950 mg/kg |
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