IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Ammonium dihydrogenphosphate with Ammonium chloride and Water

   (1) Ammonium chloride; NH4Cl; [12125-02-9]  NIST Chemistry WebBook for detail
   (2) Ammonium dihydrogenphosphate; NH4H2PO4; [7722-76-1]  NIST Chemistry WebBook for detail
   (3) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Askenasy, P.; Nessler, F., F.Z. Anorg. Chem. 189, 305 (1930).


   Concentration = Composition at 0 ºC

Prepared By:
   J. Eysseltová

Experimental Data:   (Notes on the Nomenclature)
(Please see footnotes following the table(s).)
The 0 °C isotherm for the NH4H2PO4-NH4Cl-H2O system.
Chemical1 Composition1(a)102 * Mass Fraction w1(b)m1 [mol/kg](c)Chemical2 Composition2(a)102 * Mass Fraction w2(b)m2 [mol/kg](c)Chemical3 Composition3(a)102 * Mass Fraction w3(b)Solid Phase(s)(d)ρ [g/cm3]
NH4Cl 98.322.65.52NH4H2PO41.70.840.095H2O 99076.6A1.0831
NH4Cl 99574.6A + B1.0846
NH4Cl 78.612.62.93NH4H2PO421.47.350.798H2O149080.05B1.0872
NH4Cl 62.9 7.531.70NH4H2PO437.19.541.00H2O206082.93B1.0887
NH4Cl 44.6 4.811.09NH4H2PO455.412.81.36H2O227082.35B1.0955
NH4Cl 20.2 1.990.458NH4H2PO479.816.91.81H2O245081.13B1.0990
   Table 1  a  The composition unit is mol/100 mol of solute.
   Table 1  b  These values were calculated by the compiler.
   Table 1  c  The molalities were calculated by the compiler and are expressed as mol kg–1.
   Table 1  d  The solid phases are: A=NH4Cl; B=NH4H2PO4.

   The isothermal method was used. The mixtures were agitated in a thermostat for 2 to 4 days. The solid phase was separated from the liquid phase by centrifuging. The analytical procedures are not described.

Source and Purity of Materials:
   No information is given.

Estimated Errors:
   Solubility: No information given.
   Temperature: The temperature was controlled to within ± 0.1 K. No other information is given.