SDS Volume
Volume 66. Ammonium Phosphates, p None
Source Publication
Pozin, M. E.; Kopylev, B. A.; Shilling, N. A.; Izv. Vissh. Ucheb. Zaved.; Khim. Khim. Tekhnol. 8, 883 (1965).
Conditions:
Room Temp: 10 °C
Compiler:
Methodology:
Mixtures of dry salts and water were stirred vigorously (900 rpm to 1200 rpm) and heated 1 °C to 2 °C above the temperature at which the last crystal disappeared. The solution was then cooled at the rate of 1 deg/hr to 2 deg/hr and the temperature at which the last crystal disappeared was observed. The supersaturation isotherms were constructed graphically.
Sample Information:
- Chemically pure salts were recrystallized three times before use.
Measurement Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
System Components:
- Ammonium dihydrogenphosphate, $\ce{ NH4H2PO4 }$; [7722-76-1] NIST WebBook
- Urea, $\ce{ CH4N2O }$; [57-13-6] NIST WebBook
- Ammonium nitrate, $\ce{ NH4NO3 }$; [6484-52-2] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
Remarks: NOTE: The authors state that the equilibrium solid phase is NH4H2PO4.
| 100w1 | 100w2 | 100w3 | 100w4 | m1 (mol/kg) | m2 (mol/kg) | m3 (mol/kg) |
|---|---|---|---|---|---|---|
| 5.1 | 20.5 | 14.4 | 6E+1 | 1.1 | 2.97 | 4.0 |
| 5.6 | 22.2 | 9.2 | 63 | 1.1 | 3.06 | 2.4 |
| 4.8 | 19.3 | 5.9 | 7E+1 | 0.86 | 2.40 | 1.4 |
| 8.8 | 13.2 | 18.0 | 6E+1 | 1.8 | 1.91 | 5.0 |
| 10.4 | 15.1 | 11.8 | 63 | 2.00 | 2.08 | 3.13 |
| 9.8 | 14.7 | 10.5 | 65 | 1.9 | 1.97 | 2.69 |
| 9.0 | 13.5 | 7.5 | 7E+1 | 1.6 | 1.68 | 1.8 |
| 12.0 | 12.0 | 16.0 | 6E+1 | 2.5 | 1.74 | 4.44 |
| 11.8 | 12.2 | 13.0 | 63 | 2.35 | 1.68 | 3.42 |
| 13.8 | 13.8 | 7.4 | 65 | 2.66 | 1.85 | 1.9 |
| 12.4 | 12.4 | 5.1 | 7E+1 | 2.22 | 1.55 | 1.2 |
| 21.1 | 10.5 | 8.4 | 6E+1 | 4.39 | 1.52 | 2.3 |
| 22.5 | 11.2 | 3.3 | 63 | 4.45 | 1.55 | 0.88 |
| 21.5 | 10.7 | 2.8 | 65 | 4.12 | 1.44 | 0.72 |
| 19.0 | 9.5 | 1.5 | 7E+1 | 3.39 | 1.2 | 0.36 |
(a) The composition unit is: mass % of solute.
