Hygroscopicity of salts and their equilibrium moisture content

From Saltwiki

Salt Formula Solubility [g/l (°C)] Equilibrium moisture content[%] RH (°C)
Antarcticite CaCl2•6H2O 5360 (20) 33.3 (20)
Bischofite MgCl2•H2O 1670 33.1 (20)
Nitrocalcite Ca(NO3)2•4H2O 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•10H2O 900 95.6 (20)
Epsomite MgSO4•7H2O 710 91.3 (20)
Natrite Na2CO3•10H2O 215.2 92 (18.5)
Niter KNO3 315 93.7 (20)
Syngenite K2Ca(SO4)2•H2O 2.5
Gypsum CaSO4•2H2O 2
Calcite CaCO3 0.014 (25)
Barite BaSO4 0.002