IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

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 Solubility System: Ammonium dihydrogenphosphate with Water

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Components:
   (1) Ammonium dihydrogenphosphate; NH4H2PO4; [7722-76-1]  NIST Chemistry WebBook for detail
   (2) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

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

Variables:

   Concentration = Composition and temperature.

Prepared By:
   J. Eysseltová

Experimental Data:   (Notes on the Nomenclature)
  

Solubility of ammonium dihydrogenphosphate in water.

t/°C	c [mol/l]	Chemical1	Concentration [mol/l]
0	1.98	NH4H2PO4	1.98
25	3.60	NH4H2PO4	3.60
50	5.90	NH4H2PO4	5.90
60	7.16	NH4H2PO4	7.16
70	8.35	NH4H2PO4	8.35
80	10.28	NH4H2PO4	10.28

Method/Apparatus/Procedure:
   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:

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

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Last updated: February 18, 2015 (Created: August 17, 2007)