Compilation - Ammonium dihydrogenphosphate with Dibutylamine hydrochloride, Ammonium nitrate and Water (IUPAC SDS Volume 66)
SDS Volume (2844)
Volume 66. Ammonium Phosphates, p None
Original Measurements
Volkov, A. A.; Sosnina, O. E.; Kalinkina, Z. D.; Oginskaya, N. I.; Termicheskiy Analiz i Fazovye Ravnovesiya, Perm 1985, 126.
Variables:
Room Temp: Composition at 20 °C
Prepared by:
Method/Apparatus/Procedure:
The refractometric variation of the isothermal method [1] was used.
Source and Purity of Materials:
- Reagent grade $\ce{NH4H2PO4}$ was used. Dibutyl- and tributyl-amine hydrochlorides were synthesized from the respective amines and $\ce{HCl}$.
Estimated Errors:
Ambient temperature: No information is given.
Mass concentration (m/v) (1): No information is given.
References
1 Mertslin, R. V.; Izv. Perm. Biol. Inst. 11, 1 (1937).
Components:
- Ammonium dihydrogenphosphate, $\ce{ NH4H2PO4 }$; [7722-76-1] NIST WebBook
- Dibutylamine hydrochloride, $\ce{ C8H20ClN }$; [6287-40-7] NIST WebBook
- Tributylamine hydrochloride, $\ce{ C12H28ClN }$; [6309-30-4] NIST WebBook
- Water, $\ce{ H2O }$; [7732-18-5] NIST WebBook
Experimental Data
The isotherms are given in graphical form only. The composition of the eutonic point in the NH4H2PO4-(C4H9)2NH2Cl-H2O system is: 12.6 mass % NH4H2PO4 (1.62 mol/kg H2O--compiler); 19.7 mass % (C4H9)2NH2Cl (1.76 mol/kg H2O--compiler); 67.7 mass % H2O.The authors state that the crystallization field of tributylamine hydrochloride in the NH4H2PO4-(C4H9)3NHCl-H2O system is too small to be depicted on the phase diagram.
