The formulation of the chemical in this F Class extinguisher is based on nitrogenated derivatives and ammonium salts of phosphoric acid and hydrocarbon and fluorinated surfactants in aqueous solution. The extinguisher medium forms a seal on the surface preventing re-ignition.

It is suitable to be used on Class F (cooking oil) fires.  The extinguisher has also passed the EN3 test for use on live electrical equipment up to 1000v at a distance of 1m.  The operational temperature range is from +5°C to +60°C.