SDS Volume (3013)
Volume 66. Ammonium Phosphates, p None
Original Measurements
Sarbaev, A. N.; Polyakov, E. V.; Tyunina, M. F.; Polyakova, Z. A.; Ruchkova, A. Kh.; Khim. Prom. (Moscow) 1972, 48, 597-561.
Variables:
Composition and temperature in solutions with N/P2O5 ratio of 1:1.
Prepared by:
Method/Apparatus/Procedure:
The method has been described earlier [1].
Source and Purity of Materials:
- $\ce{CO(NH2)2}$ was GOST 6691-67; $\ce{NH4H2PO4}$ was GOST 3771-64. No other information is given.
Estimated Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
References
1 Krichevskiy, I. R.; Khazanova, N. E.; Liushic, L. R.; Zh. Fiz. Khim. 1957, 31, 2711.
Components:
- Ammonium dihydrogenphosphate, $\ce{ NH4H2PO4 }$; [7722-76-1] NIST WebBook
- Urea, $\ce{ CH4N2O }$; [57-13-6] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
The solubility polytherm for the NH4H2PO4-CO(NH2)2-H2O system in a solution having a N/P2O5 ratio = 1:1 is given in graphical form. The eutectic point is specified as 28.4 mass % of fertilizer 1:1 and 72.6 mass % H2O at -9.25°C.
Compiler's Comment: The composition values are an obvious typographical error because the sum = 101%.
