SDS Volume (2937)
Volume 66. Ammonium Phosphates, p 1312
Original Measurements
Akiyama, T.; Kanzaki, H.; Minagawa, S.; Nippon Dojo Hiryogaku Zasshi 49, 243 (1978).
Variables:
Room Temp: 273, 298 and 323 $\pu{K}$
Prepared by:
Method/Apparatus/Procedure:
The $\ce{NH4H2PO4}$ or $\ce{(NH4)2HPO4)$ was added to water in a glass-stoppered bottle and heated on a water bath at 90 °C. The mixture was then allowed to settle at a given temperature for seven days. Total nitrogen content in the saturated solutions was determined by chemical analysis. The phosphate content was determined as $\ce{P2O5}$.
Source and Purity of Materials:
- Chemically pure ammonium salts were used.
Estimated Errors:
Ambient temperature: Nothing is specified.
Mass concentration (m/v) (1): Nothing is specified.
Components:
- Ammonium dihydrogenphosphate, $\ce{ NH4H2PO4 }$; [7722-76-1] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Solubility of $\ce{(NH4)2HPO4}$ in water.
| $T$ (°C) | 100w1 | m1 (mol/kg) |
|---|---|---|
| 0 | 36.3 | 4.32 |
| 25 | 41.6 | 5.39 |
| 50 | 47.0 | 6.72 |
(a) These values were calculated by the compiler.
