Saturated Salt Solutions and Air Humidity

A salt solutions can be used maintain a particular value of relative humidity

A saturated solution of salt in water can be used to maintain particular values of relative humidity inside containers and can be used to calibrate humidity sensors.

A saturated salt solution is made up as a slushy mixture with distilled water and a chemically pure salt.

Saturated Salt SolutionTemperature (ºC)
05101520253035405060
Relative humidity (%)
Ammonium nitrate 75 70 67 64 60 53
Ammonium sulphate 82 82 82 82 81 81 81 80 80 79
Magnesium chloride 34 34 33 33 33 33 32 32 32 31 29
Magnesium nitrate 60 59 57 56 54 53 51 50 48 45
Lithium chloride 11 11 11 11 11 11 11 11 11 11 11
Potassium sulphate 99 98 98 98 98 97 97 97 96 96
Potassium nitrate 96 96 96 95 95 94 92 91 89 85
Potassium chloride 89 88 87 86 85 84 84 83 82 81 80
Potassium acetate 23 23 23 23 22
Potassium hydroxide 14 12 11 9 8 7 7 6 6 5
Sodium chloride 76 76 76 76 75 75 75 75 75 74 75
Sodium nitrite 65 64 63 62 61
Sodium dichromate 61 59 57 57 55 54 53 51 50 49 47

saturated salt solutions and air humidity

Related Topics

  • Material Properties - Material properties for gases, fluids and solids - densities, specific heats, viscosities and more

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