Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Saturated Salt Solutions - Controlling Air Humidity

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

Saturated salt/water solutions can be used to maintain particular values of relative humidities inside sealed containers. A saturated salt solutions is a slushy mixture based on distilled water and a chemically pure salt.

Saturated salt/water solutions can be used to calibrate humidity sensors. Note that the values below may vary with several percents due to temperature variations, impurities in salt or water or slow saturation. 

Saturated Salt Solutions - Controlling Air Humidity
Saturated Salt SolutionTemperature (ºC)
05101520253035405060
Relative Humidity over the Salt Solution  (%)
Ammonium nitrate - NH4NO3 75 70 67 64 60 53
Ammonium sulphate - (NH4)2SO4 82 82 82 82 81 81 81 80 80 79
Lithium chloride - LiCl 1) 11.31 11.35 11.28 11.25 11.21 11.10 10.95
Magnesium chloride - MgCl2 34 34 33 33 33 33 32 32 32 31 29
Magnesium nitrate - Mg(NO3)2 60 59 57 56 54 53 51 50 48 45
Natrium Cloride - NaCl 1) 75.51 75.65 75.67 75.61 75.47 75.29 75.09 74.87
Potassium sulphate - K2SO4 99 98 98 98 98 97 97 97 96 96
Potassium nitrate - KNO3 96 96 96 95 95 94 92 91 89 85
Potassium chloride - KCl 89 88 87 86 85 84 84 83 82 81 80
Potassium acetate - CH3CO2K 23 23 23 23 22
Potassium hydroxide - KOH 14 12 11 9 8 7 7 6 6 5
Sodium chloride - NaCl 76 76 76 76 75 75 75 75 75 74 75
Sodium nitrite - NaNO2 65 64 63 62 61
Sodium dichromate - Na2Cr2O7 61 59 57 57 55 54 53 51 50 49 47

1) Saturated aqueous solutions of inorganic salts are convenient for calibration of instruments for measurement of relative humidity 

saturated salt solutions and air humidity

Related Topics

  • Material Properties

    Properties of gases, fluids and solids. Densities, specific heats, viscosities and more.

Related Documents

Search

Search is the most efficient way to navigate the Engineering ToolBox.

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp Make/Pro from the Extension Warehouse !

Translate this Page

Translate this page to Your Own Language .

About the Engineering ToolBox!

Privacy Policy

We don't collect information from our users. More about

We use a third-party to provide monetization technologies for our site. You can review their privacy and cookie policy here.

You can change your privacy settings by clicking the following button: .

Citation

This page can be cited as

  • The Engineering ToolBox (2014). Saturated Salt Solutions - Controlling Air Humidity. [online] Available at: https://www.engineeringtoolbox.com/salt-humidity-d_1887.html [Accessed Day Month Year].

Modify the access date according your visit.

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Unit Converter

















































8.21.8

.