Hygroscopicity of salts and their equilibrium moisture content
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| Salt | Formula | Solubility [g/l (°C)] | Equilibrium moisture content[%] RH (°C) |
| Antarcticite | CaCl2•6 H2O | 5360 (20) | 33.3 (20) |
| Bischofite | MgCl2•H2O | 1670 | 33.1 (20) |
| Nitrocalcite | Ca(NO3)2•4 H2O | 2660 | 53.06 (20) |
| Thermonatrite | Na2CO3•H2O | 330 | 71 (35) |
| Halite | NaCl | 358 | 75.4 (20) |
| Nitronatrite | NaNO3 | 880 | 75.3 (20) |
| Thenardite | Na2SO4 | 162 | 86.6 (20) |
| Mirabilite | Na2SO4•10 H2O | 900 | 95.6 (20) |
| Epsomite | MgSO4•7 H2O | 710 | 91.3 (20) |
| Natrite | Na2CO3•10 H2O | 215.2 | 92 (18.5) |
| Niter | KNO3 | 315 | 93.7 (20) |
| Syngenite | K2Ca(SO4)2•H2O | 2.5 | |
| Gypsum | CaSO4•2 H2O | 2 | |
| Calcite | CaCO3 | 0.014 (25) | |
| Baryte | BaSO4 | 0.002 |