Specifications :
| Properties | |
|---|---|
| Molecular formula | H3O4P |
| Molar mass | 98.00 g mol1 |
| Appearance | white solid or colourless, viscous liquid (42 °C) deliquescent |
| Density | 1.885 g/mL (liquid) 1.685 g/mL (85% solution) 2.030 g/mL (crystal at 25 °C) |
| Melting point | 42.35°C (108.23°F; 315.50 K) (anhydrous) 29.32°C (84.78°F; 302.47 K) (hemihydrate) |
| Boiling point | 158°C (316°F; 431 K) 213°C (415°F; 486 K) decomposes |
| Solubility in water | 392.2 g/100 g (-16.3 °C) 369.4 g/100 mL (0.5 °C) 446 g/100 mL (14.95 °C) miscible (42.3 °C) |
| Solubility | soluble in ethanol |
| Acidity (pKa) | 1 = 2.148 2 = 7.198 3 = 12.319 |
| Refractive index (nD) | 1.34203 |
| Viscosity | 2.4“9.4 cP (85% aq. soln.) 147 cP (100%) |