IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ammonium dihydrogenphosphate with Ammonium nitrate and Water

Components:
   (1) Ammonium dihydrogenphosphate; NH4H2PO4; [7722-76-1]  NIST Chemistry WebBook for detail
   (2) Ammonium nitrate; NH4NO3; [6484-52-2]  NIST Chemistry WebBook for detail
   (3) Water; H2O; [7732-18-5]  NIST Chemistry WebBook for detail

Original Measurements:
   Shenkin, Ya.S.; Ruchnova, S.A.; Shenkina, A.F., Zh. Neorg. Khim. 1968, 13, 256; Shenkin, Ya.S.; Ruchnova, S.A.; Shenkina, A.F., Zh. Prikl. Khim. (Leningrad) 1970, 43, 1163.

Variables:

   Concentration = Temperature and composition at 0.13 atm, 0.5 atm and 1 atm.

Prepared By:
   J. Eysseltová

Experimental Remarks:

   Remarks: Compiler's Note: The data at 0.13 atm were published in source paper 2. The rest of the data were published in source paper 1.

Experimental Data:   (Notes on the Nomenclature)
(Please see footnotes following the table(s).)

Table 1
Boiling Point/°C	Pressure [atm]	Chemical₁	10² * Mass Fraction w₁	m₁ [mol/kg]^(a)	Chemical₂	10² * Mass Fraction w₂	m₂ [mol/kg]^(a)	Chemical₃	10² * Mass Fraction w₃	Solid Phase(s)^(b)
55.6	0.13	NH4NO3	----	----	NH4H2PO4	45.81	7.35	H2O	54.19	A
58.7	0.13	NH4NO3	8.21	1.83	NH4H2PO4	35.64	5.52	H2O	56.15	A
59.3	0.13	NH4NO3	23.36	5.43	NH4H2PO4	22.92	3.71	H2O	53.72	A
59.3	0.13	NH4NO3	37.35	9.57	NH4H2PO4	13.88	2.47	H2O	48.77	A
61.1	0.13	NH4NO3	41.24	10.54	NH4H2PO4	9.88	1.76	H2O	48.88	A
62.9	0.13	NH4NO3	47.85	13.38	NH4H2PO4	7.48	1.46	H2O	44.67	A
64.5	0.13	NH4NO3	59.17	21.16	NH4H2PO4	5.90	1.47	H2O	34.93	A
71.4	0.13	NH4NO3	60.43	21.81	NH4H2PO4	4.96	1.25	H2O	34.61	A
67.5	0.13	NH4NO3	63.00	25.77	NH4H2PO4	6.46	1.84	H2O	30.54	A
68.4	0.13	NH4NO3	65.19	28.41	NH4H2PO4	6.15	1.87	H2O	28.66	A
69.4	0.13	NH4NO3	68.55	32.40	NH4H2PO4	5.02	1.65	H2O	26.43	A
77.2	0.13	NH4NO3	72.93	43.16	NH4H2PO4	5.96	2.45	H2O	21.11	A
79.2	0.13	NH4NO3	75.70	48.32	NH4H2PO4	4.73	2.10	H2O	19.57	A
87.2	0.13	NH4NO3	76.47	53.97	NH4H2PO4	5.83	2.86	H2O	17.70	A
80.5	0.13	NH4NO3	79.42	58.74	NH4H2PO4	3.69	1.90	H2O	16.89	A
89.5	0.13	NH4NO3	81.37	79.23	NH4H2PO4	5.80	3.93	H2O	12.83	A
84.7	0.13	NH4NO3	83.80	105.42	NH4H2PO4	6.27	5.49	H2O	9.93	A
87.4	0.13	NH4NO3	87.03	253.43	NH4H2PO4	8.68	17.59	H2O	4.29	A + B
86.0	0.13	NH4NO3	91.74	138.75	NH4H2PO4	----	----	H2O	8.26	B
85.5	0.5	NH4NO3	----	----	NH4H2PO4	59.90	12.98	H2O	40.10	A
89.4	0.5	NH4NO3	8.35	2.53	NH4H2PO4	50.35	10.60	H2O	41.30	A
89.9	0.5	NH4NO3	16.19	5.08	NH4H2PO4	44.01	9.61	H2O	39.80	A
91.6	0.5	NH4NO3	16.83	5.36	NH4H2PO4	43.98	9.76	H2O	39.19	A
91.6	0.5	NH4NO3	25.05	7.67	NH4H2PO4	34.16	7.28	H2O	40.79	A
91.5	0.5	NH4NO3	28.89	8.87	NH4H2PO4	30.40	6.49	H2O	40.71	A
92.4	0.5	NH4NO3	33.60	10.52	NH4H2PO4	26.50	5.77	H2O	39.90	A
94.0	0.5	NH4NO3	44.19	13.95	NH4H2PO4	16.23	3.56	H2O	39.58	A
95.3	0.5	NH4NO3	46.36	16.39	NH4H2PO4	18.31	4.51	H2O	35.33	A
96.0	0.5	NH4NO3	56.68	22.76	NH4H2PO4	12.21	3.41	H2O	31.11	A
97.6	0.5	NH4NO3	52.45	18.89	NH4H2PO4	12.86	3.22	H2O	34.69	A
99.7	0.5	NH4NO3	59.94	25.86	NH4H2PO4	11.11	3.34	H2O	28.95	A
101.3	0.5	NH4NO3	66.01	33.51	NH4H2PO4	9.38	3.31	H2O	24.61	A
104.0	0.5	NH4NO3	68.12	37.27	NH4H2PO4	9.05	3.45	H2O	22.83	A
109.4	0.5	NH4NO3	71.33	46.46	NH4H2PO4	9.49	4.30	H2O	19.18	A
109.5	0.5	NH4NO3	73.30	50.79	NH4H2PO4	8.67	4.18	H2O	18.03	A
115.5	0.5	NH4NO3	76.53	61.09	NH4H2PO4	7.82	4.34	H2O	15.65	A
117.4	0.5	NH4NO3	78.04	76.22	NH4H2PO4	9.17	6.23	H2O	12.79	A
125.5	0.5	NH4NO3	78.67	94.68	NH4H2PO4	10.95	9.17	H2O	10.38	A
138.4	0.5	NH4NO3	79.65	145.04	NH4H2PO4	13.49	17.09	H2O	6.86	A
139.5	0.5	NH4NO3	78.65	152.33	NH4H2PO4	14.90	20.08	H2O	6.45	A
146.0	0.5	NH4NO3	79.30	168.47	NH4H2PO4	14.82	21.91	H2O	5.88	A
131.1	0.5	NH4NO3	78.13	176.49	NH4H2PO4	16.34	25.68	H2O	5.53	A
150.0	0.5	NH4NO3	77.02	198.38	NH4H2PO4	18.13	32.49	H2O	4.85	A
171.3	0.5	NH4NO3	41.08	189.36	NH4H2PO4	56.21	180.30	H2O	2.71	A
173.4	0.5	NH4NO3	33.40	187.95	NH4H2PO4	64.38	252.09	H2O	2.22	A
183.0	0.5	NH4NO3	28.40	186.73	NH4H2PO4	69.70	318.88	H2O	1.90	A
109.0	1	NH4NO3	----	----	NH4H2PO4	70.95	21.23	H2O	29.05	A
110.4	1	NH4NO3	7.30	3.07	NH4H2PO4	62.96	18.40	H2O	29.74	A
111.8	1	NH4NO3	12.78	5.35	NH4H2PO4	57.38	16.72	H2O	29.84	A
111.6	1	NH4NO3	16.47	7.00	NH4H2PO4	54.14	16.01	H2O	29.39	A
112.8	1	NH4NO3	25.25	10.57	NH4H2PO4	44.90	13.08	H2O	29.85	A
114.4	1	NH4NO3	33.69	14.50	NH4H2PO4	37.29	11.17	H2O	29.02	A
115.8	1	NH4NO3	39.63	16.91	NH4H2PO4	31.09	9.23	H2O	29.28	A
116.3	1	NH4NO3	40.35	17.23	NH4H2PO4	30.39	9.03	H2O	29.26	A
117.4	1	NH4NO3	45.48	20.26	NH4H2PO4	26.48	8.21	H2O	28.04	A
119.2	1	NH4NO3	51.05	24.18	NH4H2PO4	22.58	7.44	H2O	26.37	A
121.4	1	NH4NO3	54.82	27.41	NH4H2PO4	20.20	7.03	H2O	24.98	A
125.6	1	NH4NO3	59.35	31.68	NH4H2PO4	17.25	6.41	H2O	23.40	A
122.9	1	NH4NO3	61.32	38.83	NH4H2PO4	18.95	8.35	H2O	19.73	A
127.2	1	NH4NO3	64.80	43.85	NH4H2PO4	16.74	7.88	H2O	18.46	A
125.9	1	NH4NO3	66.67	51.63	NH4H2PO4	17.20	9.27	H2O	16.13	A
135.2	1	NH4NO3	67.78	57.44	NH4H2PO4	17.48	10.31	H2O	14.74	A
140.8	1	NH4NO3	68.95	71.01	NH4H2PO4	18.92	13.56	H2O	12.13	A
148.0	1	NH4NO3	69.75	98.09	NH4H2PO4	21.37	20.91	H2O	8.88	A
151.5	1	NH4NO3	69.33	121.98	NH4H2PO4	23.57	28.86	H2O	7.10	A
153.5	1	NH4NO3	69.61	127.13	NH4H2PO4	23.55	29.93	H2O	6.84	A
156.1	1	NH4NO3	67.78	125.63	NH4H2PO4	25.48	32.86	H2O	6.74	A
157.7	1	NH4NO3	68.32	150.52	NH4H2PO4	26.01	39.88	H2O	5.67	A
161.7	1	NH4NO3	61.98	146.64	NH4H2PO4	32.74	53.90	H2O	5.28	A
166.2	1	NH4NO3	60.96	347.73	NH4H2PO4	36.85	146.27	H2O	2.19	A
179.0	1	NH4NO3	39.11	148.50	NH4H2PO4	57.60	152.19	H2O	3.29	A

Notes:
   Table 1  ^a  These values were calculated by the compiler.
   Table 1  ^b  The solid phases are: A-NH₄H₂PO₄; B-NH₄NO₃.

Method/Apparatus/Procedure:
   The saturated solution and solid phase were placed in a three-necked bottle. A thermometer was placed in one neck. In another neck there was a two-parallel reflux condenser connected to a differential manometer. After equilibrium the phases were sampled with a filter pipet which was placed in the third neck of the flask. Nitrogen content was determined by the Kjeldahl method, phosphorus by the pyrophosphate method (probably weighed as Mg₂P₂O₇--compiler) and water by the iodine-acetate method (no details given).

Source and Purity of Materials:
   All materials were of chemically pure grade and were recrystallized twice from water.

Estimated Errors:
   Solubility: No information is given.
   Temperature: No information is given.