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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Ammonium dihydrogenphosphate with Dibutylamine hydrochloride, Ammonium nitrate and Water
Components:
(1) Ammonium dihydrogenphosphate; NH4H2PO4; [7722-76-1]
NIST Chemistry WebBook
for detail
(2) Dibutylamine hydrochloride; C8H20ClN; [6287-40-7]
NIST Chemistry WebBook
for detail
(3) Tributylamine hydrochloride; C12H28ClN; [6309-30-4]
NIST Chemistry WebBook
for detail
(4) Water; H2O; [7732-18-5]
NIST Chemistry WebBook
for detail
Original Measurements:
Volkov, A.A.; Sosnina, O.E.; Kalinkina, Z.D.; Oginskaya, N.I., Termicheskiy Analiz i Fazovye Ravnovesiya, Perm 1985, 126.
Variables:
Concentration = Composition at 20 ºC.
Prepared By:
J. Eysseltová
Experimental Remarks:
Remarks: The isotherms are given in graphical form only. The composition of the eutonic point in the NH
4
H
2
PO
4
-(C
4
H
9
)
2
NH
2
Cl-H
2
O system is: 12.6 mass % NH
4
H
2
PO
4
(1.62 mol/kg H
2
O--compiler); 19.7 mass % (C
4
H
9
)
2
NH
2
Cl (1.76 mol/kg H
2
O--compiler); 67.7 mass % H
2
O. The authors state that the crystallization field of tributylamine hydrochloride in the NH
4
H
2
PO
4
-(C
4
H
9
)
3
NHCl-H
2
O system is too small to be depicted on the phase diagram.
Experimental Data:
(Notes on the Nomenclature)
Method/Apparatus/Procedure:
The refractometric variation of the isothermal method
1
was used.
Source and Purity of Materials:
Reagent grade NH
4
H
2
PO
4
was used. Dibutyl- and tributyl-amine hydrochlorides were synthesized from the respective amines and HCl.
Estimated Errors:
Solubility: No information is given.
Temperature: No information is given.
References:
1
Merclin, R.V. Izv. ENI Perm. Un-t 1937,
11
, 1.