IUPAC-NIST Solubilities Database

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IUPAC-NIST Solubility Database NIST Standard Reference Database 106 Glass Ball as Bullet Solubility System: Diammonium hydrogenphosphate with Diammonium persulfate and Water Components: (1) Diammonium hydrogenphosphate; (NH4)2HPO4; [7783-28-0] NIST Chemistry WebBook for detail (2) Diammonium persulfate; (NH4)2S2O8; [7727-54-0] NIST Chemistry WebBook for detail (3) Water; H2O; [7732-18-5] NIST Chemistry WebBook for detail Original Measurements: Babenko, A.M.; Andrianov, A.M., Ukr. Khim. Zh. 1982, 48, 15. Variables: Concentration = Composition and temperature Prepared By: J. Eysseltová Experimental Data: (Notes on the Nomenclature) (Please see footnotes following the table(s).) Solubility in the (NH4)2HPO2-(NH4)2S2O8-H2O system
t/°CChemical1102 * Mass Fraction w1m1 [mol/kg](a)Chemical2102 * Mass Fraction w2m2 [mol/kg](a)Chemical3102 * Mass Fraction w3Solid Phase(s)(b)
-7.3(NH4)2S2O832.02.06(NH4)2HPO40.00.0H2O68.0A + X
-8.3(NH4)2S2O828.01.89(NH4)2HPO47.20.84H2O64.8A + X
-9.0(NH4)2S2O827.91.88(NH4)2HPO47.10.81H2O65.1A + X
-9.0(NH4)2S2O822.01.54(NH4)2HPO415.61.89H2O62.4A + X
-10.2(NH4)2S2O821.01.46(NH4)2HPO416.01.92H2O63.0A + X
-10.5(NH4)2S2O816.01.14(NH4)2HPO422.682.801H2O61.32A + X
-11.0(NH4)2S2O815.21.10(NH4)2HPO424.02.99H2O60.8A + X
-11.8(NH4)2S2O812.00.879(NH4)2HPO428.163.563H2O59.84A + X + B
-5.4(NH4)2S2O80.00.0(NH4)2HPO426.32.70H2O73.7A + B
-9.0(NH4)2S2O87.20.49(NH4)2HPO428.03.27H2O64.8A + B
+16.0(NH4)2S2O80.00.0(NH4)2HPO439.64.96H2O60.4B + C
+29.0(NH4)2S2O83.00.23(NH4)2HPO440.745.483H2O56.26B + C
+32.5(NH4)2S2O86.00.49(NH4)2HPO440.05.61H2O54.0B + C + D
+13.0(NH4)2S2O88.00.60(NH4)2HPO433.124.259H2O58.88B + D
+27.8(NH4)2S2O86.40.49(NH4)2HPO436.04.73H2O57.6B + D
+22.5(NH4)2S2O813.81.10(NH4)2HPO431.04.25H2O55.2B + D + X
+14.5(NH4)2S2O829.42.36(NH4)2HPO416.02.22H2O54.6D + X
+23.0(NH4)2S2O834.42.92(NH4)2HPO414.02.05H2O51.6D + X
+12.2(NH4)2S2O819.01.46(NH4)2HPO424.03.19H2O57.0D + X
+11.0(NH4)2S2O824.01.88(NH4)2HPO420.02.70H2O56.0D + X
-10(NH4)2S2O821.01.46(NH4)2HPO416.01.92H2O63.0A
-10(NH4)2S2O815.61.10(NH4)2HPO422.02.67H2O62.4A
-10(NH4)2S2O814.00.977(NH4)2HPO422.222.802H2O62.78A
-10(NH4)2S2O821.1251.4607(NH4)2HPO415.51.85H2O63.375X
-10(NH4)2S2O816.11.15(NH4)2HPO422.6532.8007H2O61.247X
-10(NH4)2S2O815.161.096(NH4)2HPO424.23.02H2O60.64X
-10(NH4)2S2O812.20.895(NH4)2HPO428.0963.5634H2O59.704X
-5(NH4)2S2O823.01.31(NH4)2HPO40.000.0H2O77.0A
-5(NH4)2S2O815.00.859(NH4)2HPO48.50.84H2O76.5A
-5(NH4)2S2O88.50.49(NH4)2HPO415.01.48H2O76.5A
-5(NH4)2S2O818.81.10(NH4)2HPO46.00.60H2O75.2A
-5(NH4)2S2O80.00.0(NH4)2HPO424.32.43H2O75.7A
-5(NH4)2S2O80.00.0(NH4)2HPO426.42.72H2O73.6A
-5(NH4)2S2O833.42.20(NH4)2HPO40.00.0H2O66.6X
-5(NH4)2S2O829.52.04(NH4)2HPO47.050.841H2O63.45X
-5(NH4)2S2O827.61.88(NH4)2HPO48.00.94H2O64.4X
-5(NH4)2S2O823.51.68(NH4)2HPO415.31.89H2O61.2X
-5(NH4)2S2O820.8751.461(NH4)2HPO416.52.00H2O62.625X
-5(NH4)2S2O818.01.32(NH4)2HPO422.142.801H2O59.86X
-5(NH4)2S2O813.00.963(NH4)2HPO427.843.563H2O59.16X
-5(NH4)2S2O815.01.10(NH4)2HPO425.03.16H2O60.0X
-5(NH4)2S2O87.20.49(NH4)2HPO428.03.27H2O64.8B
0(NH4)2S2O835.62.42(NH4)2HPO40.00.0H2O64.4X
0(NH4)2S2O831.52.24(NH4)2HPO46.850.841H2O61.65X
0(NH4)2S2O825.51.87(NH4)2HPO414.91.89H2O59.6X
0(NH4)2S2O820.01.50(NH4)2HPO421.62.80H2O58.4X
0(NH4)2S2O87.140.487(NH4)2HPO428.63.37H2O64.26X
0(NH4)2S2O814.91.10(NH4)2HPO425.53.24H2O59.6X
0(NH4)2S2O820.51.46(NH4)2HPO418.02.22H2O61.5X
0(NH4)2S2O826.71.88(NH4)2HPO411.01.34H2O62.3X
0(NH4)2S2O80.00.0(NH4)2HPO427.82.92H2O72.2B
10(NH4)2S2O839.62.87(NH4)2HPO40.00.0H2O60.4X
10(NH4)2S2O835.02.62(NH4)2HPO46.50.84H2O58.5X
10(NH4)2S2O829.51.95(NH4)2HPO44.10.47H2O66.4X
10(NH4)2S2O824.01.82(NH4)2HPO418.242.391H2O57.76X
10(NH4)2S2O816.01.23(NH4)2HPO426.883.563H2O57.12X
10(NH4)2S2O824.61.88(NH4)2HPO418.02.37H2O57.4X
10(NH4)2S2O819.251.461(NH4)2HPO423.03.02H2O57.75X
10(NH4)2S2O86.50.46(NH4)2HPO431.03.76H2O62.5B
10(NH4)2S2O80.00.0(NH4)2HPO435.04.08H2O65.0B
10(NH4)2S2O814.51.10(NH4)2HPO427.53.59H2O58.0B
20(NH4)2S2O833.52.76(NH4)2HPO413.31.89H2O53.2D
20(NH4)2S2O828.02.33(NH4)2HPO419.442.801H2O52.56D
20(NH4)2S2O818.01.41(NH4)2HPO426.243.563H2O55.76D
20(NH4)2S2O810.20.778(NH4)2HPO432.3284.2594H2O57.472D
20(NH4)2S2O86.60.49(NH4)2HPO434.04.33H2O59.4B
20(NH4)2S2O814.01.10(NH4)2HPO430.04.06H2O56.0D
20(NH4)2S2O818.51.46(NH4)2HPO426.03.55H2O55.5D
20(NH4)2S2O839.03.11(NH4)2HPO46.10.84H2O54.9X
 Notes: Table 1 a The molalities were calculated by the compiler. Table 1 b The solid phases are: A=ice; B=(NH4)2HPO2·2H2O; C=(NH4)2HPO2; D=(NH4)2S2O8; X="m(NH4)2S2O8·n(NH4)2HPO2" (an unidentified solid phase - either solid solution or a compound). Method/Apparatus/Procedure: An improved visual polythermic method1 was used. Source and Purity of Materials: Reagent grade salts were recrystallized and dried at 40 °C to 50 °C. Estimated Errors: Solubility: No information given. Temperature: Precision of temperature measurement was ± 0.4 K. References: 1L. N. Erayzer and I. M. Kaganskiy, Zavod. Lab. 1, 119 (1967).

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