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

Liquids - Vapor Pressures

Vapor and saturation pressure for some common liquids.

The vapor pressure of a liquid is defined as the pressure exerted by the molecules that escapes from the liquid to form a separate vapor phase above the liquid surface.

The pressure exerted by the vapor phase is called the

  • vapor or saturation pressure

Vapor or saturation pressure depends on temperature.

If a fluid consist of more than one component (a solution), components with

  • higher vapor pressure are called light components
  • lower vapor pressure are called heavy components

Temperature and Vapor or Saturation Pressure for some common Fluids

At atmospheric pressure saturation temperature of  

  • water : 100 oC  (212 oF)
  • ethyl alcohol : 78.5 oC (173 oF)

Liquids - Vapor Pressure

Approximate vapor pressure for temperatures in the range 20 oC - 25 oC (68 oF - 77 oF).

Liquids - Vapor Pressures
Fluid NameVapor Pressure
Acetaldehyde 120
Acetic acid 2.1
Acetic acid anhydride 0.68
Acetone 30
Allyl alcohol 2.3
Allyl chloride 40
Aluminum nitrate, 10% solution in water 2.4
Aluminum sulphate, 10% solution in water 2.4
Amyl acetate 0.47
Aniline 0.09
Beer 2.4
Benzene 14
Benzyl alcohol 0.013
Bromine 28
Butyl acetate 1.5
Butyl alcohol, 1-butanol 0.93
Butyric acid n 0.43
Calcium chloride, 25% solution in water 2.4
Calcium chloride, 5% solution in water 2.4
Carbon disulphide 48
Carbon tetrachloride 15.3
Chloroform 26
Cyclohexanol 0.9
Cyclohexanone 0.67
Ethyl acetate 14
Ethyl alcohol 12.4
Ethyl glycol 0.7
Ethylene glycol 0.007
Formic acid 5.7
Furfurol, 2-Furaldehyde 0.3
Heptane 6
Hexane 17.6
Isopropyl alcohol (rubbing alcohol) 4.4
Kerosene 0.7
Methyl acetate 28.8
Methyl alcohol, methanol 16.9
Methylene chloride, dichloromethane 58
Milk 2.4
Nitrobenzene 0.03
Nonane 0.6
Octane 1.9
Pentane 58
Phenol 0.05
Propanol 2.8
Propionic acid 0.47
Sea water 2.4
Sodium chloride, 25% solution in water 2.4
Sodium hydroxide, 20% solution in water 2.4
Sodium hydroxide, 30% solution in water 2.4
Styrene 0.85
Tetrachloroethane 0.7
Tetrachloroethylene 2.5
Toluene 3.8
Trichloroethylene 9.2
Water 2.4
  • 1 kPa = 103 Pa = 0.145 psi

Related Topics

  • Gases and Compressed Air

    Properties of air, LNG, LPG and other common gases. Pipeline capacities and sizing of relief valves.
  • Material Properties

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

    Design of pumping systems and pipelines. With centrifugal pumps, displacement pumps, cavitation, fluid viscosity, head and pressure, power consumption and more.

Related Documents


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: .


This page can be cited as

  • The Engineering ToolBox (2006). Liquids - Vapor Pressures. [online] Available at: [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