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.; Blumer, O., Helv. Chim. Acta 1955, 38, 753.


   Concentration = Composition at 25 ºC.

Prepared By:
   J. Eysseltová

Experimental Data:   (Notes on the Nomenclature)
(Please see footnotes following the table(s).)
Composition of saturated solutions of the NH4+-H+-PO43–-H2O system at 25 °C.
Chemical1Mass Fraction w1Chemical2Mass Fraction w2Chemical3102 * Mass Fraction w3m3 [mol/kg]Chemical4102 * Mass Fraction w4m4 [mol/kg]Chemical5102 * Mass Fraction w5(b)Mole Fractio5nSolid Phase(s)(c)
NH4+12.8H+87.2NH3 (b)5.4023.3H3PO4 (b)81.060.65H2O13.630.5A + B
NH4+12.8H+87.2NH3 (b)5.4123.4H3PO4 (b)81.161.05H2O13.530.3A + B
NH4+12.8H+87.2NH3 (b)5.4123.6H3PO4 (b)81.161.46H2O13.530.1B
NH4+12.8H+87.2NH3 (b)5.4424.6H3PO4 (b)81.664.01H2O13.028.9B
NH4+12.7H+87.3NH3 (b)5.4124.8H3PO4 (b)81.865.13H2O12.828.4B
NH4+12.7H+87.3NH3 (b)5.4526.3H3PO4 (b)82.369.02H2O12.326.8B + C
NH4+11.4H+88.6NH3 (b)4.9926.7H3PO4 (b)84.078.05H2O11.023.7C
NH4+10.3H+89.7NH3 (b)4.6027.8H3PO4 (b)85.789.80H2O9.720.6C
NH4+10.1H+89.9NH3 (b)4.5328.3H3PO4 (b)86.193.42H2O9.419.8C
NH4+9.2H+90.8NH3 (b)4.340.5H3PO4 (b)89.5146.8H2O6.212.6C
NH4+8.9H+91.1NH3 (b)4.372.6H3PO4 (b)92.3272.0H2O3.56.8C
NH4+9.2H+90.8NH3 (b)4.5170H3PO4 (b)93.9616.6H2O1.63.0C
NH4+9.2H+90.8NH3 (b)4.5182H3PO4 (b)94.0660.6H2O1.52.8C
NH4+9.3H+90.7NH3 (b)4.6198H3PO4 (b)94.1711.5H2O1.32.6C
NH4+9.1H+90.9NH3 (b)4.5210H3PO4 (b)94.3770.7H2O1.22.4C
NH4+4.0H+96.0NH3 (b)2.076.5H3PO4 (b)96.4637.9H2O1.52.9C
NH4+4.0H+96.0NH3 (b)2.067.3H3PO4 (b)96.2560.5H2O1.83.3C
NH4+1.2H+98.8NH3 (b)0.608.9H3PO4 (b)95.4246.6H2O4.07.5C
NH4+0.0H+100.0NH3 (b)0.00.0H3PO4 (b)95.6220.2H2O4.48.4C
   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)3H9(PO4)4; C=NH4H5(PO4)2; D=H3PO4.

   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 0.1 %.