IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Glass Ball as Bullet Solubility System: Ammonia with Phosphoric acid and Water

   (1) Ammonia; NH3; [7664-41-7]  NIST Chemistry WebBook for detail
   (2) Phosphoric acid; H3PO4; [7664-38-2]  NIST Chemistry WebBook for detail
   (3) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Flatt, R.; Brunisholz, G.; Denereaz, A., Helv. Chim. Acta 1956, 39, 483.


   Concentration = Composition at 50 ºC

Prepared By:
   J. Eysseltová

Experimental Data:   (Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Composition of saturated solutions in the (NH4)3-PO4-H3PO4-H2O system at 25 °C.
Chemical1Mass Fraction w1Chemical2Mole Fraction2(a)Chemical3102 * Mass Fraction w3m3 [mol/kg]Chemical4102 * Mass Fraction w4m4 [mol/kg]Chemical5102 * Mass Fraction w5(b)Solid Phase(s)(c)
NH4+22.7H2O171.8NH3 (b)5.737.33H3PO4 (b)48.410.8H2O (b)45.87A + B
NH4+33.4H2O309.6NH3 (b)6.045.99H3PO4 (b)34.75.97H2O (b)59.26A + B
NH4+33.4H2O312.6NH3 (b)6.015.93H3PO4 (b)34.55.92H2O (b)59.49B
NH4+39.4H2O233.2NH3 (b)8.249.38H3PO4 (b)40.17.93H2O (b)51.63B
NH4+43.3H2O187.2NH3 (b)10.012.8H3PO4 (b)44.39.88H2O (b)45.73B
NH4+46.0H2O150.5NH3 (b)11.117.0H3PO4 (b)48.312.3H2O (b)40.11B + C
NH4+49.5H2O111.0NH3 (b)13.824.8H3PO4 (b)53.516.7H2O (b)32.74C
NH4+49.7H2O111.3NH3 (b)13.824.8H3PO4 (b)53.416.6H2O (b)32.78C
NH4+53.3H2O154.5NH3 (b)13.019.1H3PO4 (b)47.012.0H2O (b)40.01C
NH4+55.5H2O176.6NH3 (b)12.817.4H3PO4 (b)44.210.5H2O (b)43.04C
NH4+59.0H2O217.6NH3 (b)12.315.1H3PO4 (b)39.98.50H2O (b)47.86C
NH4+62.8H2O250.0NH3 (b)12.113.9H3PO4 (b)37.07.40H2O (b)50.95C
NH4+65.5H2O274.7NH3 (b)12.013.2H3PO4 (b)35.06.73H2O (b)53.04C
NH4+66.2H2O278.3NH3 (b)12.013.2H3PO4 (b)34.76.65H2O (b)53.30C
NH4+66.3H2O274.2NH3 (b)12.113.4H3PO4 (b)35.06.75H2O (b)52.92C
NH4+68.1H2O281.7NH3 (b)12.213.4H3PO4 (b)34.46.57H2O (b)53.42C
   Table 1  a  The composition unit is mol/100 mol solute.
   Table 1  b  These values were calculated by the compiler.
   Table 1  c  The solid phases are: A=NH4H2PO4; B=(NH4)2HPO4; C=(NH4)7H2(PO)4)3.

   No information is given.

Source and Purity of Materials:
   No information is given.

Estimated Errors:

   Temperature: No information is given. The compiler estimates the reproducibility to be about 0.5 %.