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

This is an AMP page - Open full page! for all features.

Flash Points - Liquids

Sponsored Links

The flash point of a chemical substance is the lowest temperature where enough fluid can evaporate to form a combustible concentration of gas.

The flash point is an indication of how easy a chemical may burn. Materials with higher flash points are less flammable or hazardous than chemicals with lower flash points.

Some liquids and their flash points at atmospheric pressure:

See also Autoignition temperature and flash point of different hydrocarbons

Liquids - Flash Points
FuelFlash Point
( oF )

Acetaldehyde -36
Acetone 0
Acentonitrile 43
Acrylonitrile 32
Allyamine -20
Aniline 158
Anisole 126
Benzene 12
Benzaldehyde 145
Biodiesel 266
Butanal -7.6
n-Butane -76
1-Butanol 99
Carbon Disulfide -22
Cyclohexanone 111
Diesel Fuel (1-D) 100
Diesel Fuel (2-D) 126
Diesel Fuel (4-D) 130
Diethanolamine 342
Diethylene glycol diethyl ether 180
Diethyl ether -49
Diisopropyl ether -18
Dimethyl sulfate 181
Dimethyl sulfide -35
Ethyl Alcohol (Ethanol) 63
Ethylamine 3.2
Formaldehyde 185
Fuels Oil No.1 100 - 162
Fuels Oil No.2 126 - 204
Fuels Oil No.4 142 - 240
Fuels Oil No.5 Lite 156 - 336
Fuels Oil No.5 Heavy 160 - 250
Fuels Oil No.6 150
Furfural 140
Furfuryl alcohol 167
Gasoline -45
Gear oil 375 - 580
Hexylamine 84
Iso-Butane -117
Iso-Pentane less than -60
Iso-Octane 10
Isopropylbenzene hydroperoxide 347
Jet fuel (A/A-1) 100 - 150
Kerosene (paraffin) 100 - 162
Methyl Alcohol (Methanol) 52
Methylamine 32
Motor oil 420 - 485
Naphtha 32 - 86
n-Pentane less than -40
n-Hexane -7
n-Heptane 25
n-Octane 56
Naphthalene 174
NeoHexane -54
Paraldehyde 97
Peroxyacetic acid 106
Petroleum ether < 0
Propanal -22
Propane -156
2-Propanol 54
Propylamine -35
Styrene 90
Tetrohydrofuran 151
Toluene 40
Triethanolamine 354
Triethylamine 19
o-Xylene 63
m-Xylene 81
p-Xylene 81
  • T(oC) = 5/9[T( oF) - 32]
Note! - the Auto-Ignition Temperature is not the same as Flash Point - The Auto-Ignition Temperature indicates the minimum temperature required to ignite a gas or vapor in air without a spark or flame being present . Temperature classification of equipment in hazardous areas are related to surrounding substances auto-ignition temperature.
Sponsored Links

Related Topics


Combustion processes and their efficiency. Boiler house and chimney topics. Properties of fuels like oil, gas, coal and wood and more. Safety valves and tanks.

Risk, Reliability and Safety

Risk, reliability and safety in process control systems.

Related Documents

Alternative Fuels - Properties

Properties of alternative fuels like biodiesel, E85, CNG and more.

Biomasses - Energy Content when Used as Fuel

Biomass fuels and their energy content.

Butane - Thermophysical Properties

Chemical, physical and thermal properties of n-Butane.

Chemicals - Formulas and Trading Names

Formulas and trading names for some common chemicals.

Fuels - Higher and Lower Calorific Values

Higher and lower calorific values (heating values) for fuels like coke, oil, wood, hydrogen and others.

Fuels and Chemicals - Autoignition Temperatures

Autoignition points for fuels and chemicals like butane, coke, hydrogen, petroleum and more.

Gases - Explosion and Flammability Concentration Limits

Flame and explosion limits for gases like propane, methane, butane, acetylene and more.

Gasoline - Density, Specific Heat, Viscosity and Thermal Conductivity vs. Temperature

Density, specific heat, dynamic and kinematic viscosity and thermal conductivity of gasoline vs. temperature

Hazard vs. Flash Points

The flash point of a chemical indicates how easy it may ignite and burn.

Hydrocarbons - Autoignition Temperatures and Flash Points

Autoignition temperatures and flash points (°C and °F) of different types of hydrocarbons with varying carbon numbers up to C12.

Hydrocarbons - Vapor Pressures

Vapor pressure vs. temperature for propane, n-butane, n-heptane and n-pentane hydrocarbons.

Octane Liquid - Thermal Properties

Density, specific heat, thermal conductivity and more.

Oil Lubrication - Temperature Limits

Temperature limits for lubricating oils.

Piston Engines - Displacement

Calculate piston engine displacement.

Sponsored Links

Search Engineering ToolBox

  • the most efficient way to navigate the Engineering ToolBox!

SketchUp Extension - Online 3D modeling!

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 the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!


We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.