Class B liquid fires / Polar solvents

Chemical fires are polar liquid fires. Polar solvents are usually carriers of O or N atoms, or also halogens: Cl, Br, F or I.

They are characterised by their affinity for water.

There are 7 main families:

  • The alcohols: methanol, ethanol, isopropanol…
  • The ketones and aldehydes: acetone, acetaldehyde, methylethycathinone, MIBK…
  • The esthers: ethyl acetate…
  • The ethers : diethylether, MTBE, THF…
  • The glycols : a combination of ‘alcohol + ether’: MEG, MPG, Butoxyethanol, butylcarbitol…
  • The amines : trimethylamine…
  • The acids : acetic acid, propionic acid…

As they have a great affinity for water they can be only be put out using specific so-called "versatile" or AR "Alcohol Resistant" foam concentrates.

The versatile property of pseudoplastic AR foam concentrates consists in forming a protective gel coating on all types of inflammable liquids. This film also provides excellent resistance to re-ignition.

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