Hiroshi Miyamoto 0 0e+00 Ambient temperature 0 0 °C 1 3.63e+01 Percent mass fraction (1) 3 3.63 1 1 0 4.32e+00 Molality (1) 3 4.32 mol/kg 1 2.5e+01 Ambient temperature 2 2.5 °C 1 4.16e+01 Percent mass fraction (1) 3 4.16 1 2 0 5.39e+00 Molality (1) 3 5.39 mol/kg 1 5.0e+01 Ambient temperature 2 5.0 °C 1 4.70e+01 Percent mass fraction (1) 3 4.70 1 3 0 6.72e+00 Molality (1) 3 6.72 mol/kg 1 Solubility, Solubility data series The $\ce{NH4H2PO4}$ or $\ce{(NH4)2HPO4)$ was added to water in a glass-stoppered bottle and heated on a water bath at 90 °C. The mixture was then allowed to settle at a given temperature for seven days. Total nitrogen content in the saturated solutions was determined by chemical analysis. The phosphate content was determined as $\ce{P2O5}$. The International Union of Pure and Applied Chemistry Akiyama, T.; Kanzaki, H.; Minagawa, S.; Nippon Dojo Hiryogaku Zasshi 49, 243 (1978). paper https://doi.org/10.20710/dojo.49.3_243 7722-76-1 1 NH4H2PO4 InChI=1S/H3N.H3O4P/c;1-5(2,3)4/h1H3;(H3,1,2,3,4) LFVGISIMTYGQHF-UHFFFAOYSA-N 115.026 Ammonium dihydrogenphosphate Chemically pure ammonium salts were used. 7732-18-5 2 H2O InChI=1S/H2O/h1H2 XLYOFNOQVPJJNP-UHFFFAOYSA-N 18.0153 Water Ammonium dihydrogenphosphate with Water