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What is the chemical composition for ABC dry powder used in fire extinguisher?
Wiki User
∙ 11y ago
There are a few different types of dry powder. The most common one, suitable for class A, B, C and electrical fires ((A=Solids, B=Liquids, C=Flammable Gases) and found in most household units, contains monammonium phosphate. This decomposes in a flame and produces free radicals (unpaired electrons) which interrupt the combustion process. Additionally, the chemical melts and forms an insulating "skin" on burning solids, smothering the flames. (Note - the fire clases above are for UK regulations; in North America the fire classification is: A=ordinary combustibles, B=flammable and combustible liquids and gases, C=energized electrical equipment/appliances).
Units using sodium bicarbonate are not used on class A fires, but are particularly effective on liqud (class B) fires. Potassium carbonate (purple K) is sometimes used as an alternative.
For motor racing, where rapid fire knockdown is needed, Monnex (combining a bicarbonate powder with urea) is used; this has superb quenching power for liquid fuel fires.
Finally, there are specialsit powders available for dealing with burning metals, which react with all other extinguishing agents and powders. These contain powdered sodium chloride, powdered graphite or powdered copper metal.
Wiki User
∙ 14y ago
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What is monex dry powder?
A type chemical fire extinguisher.
Should a dry chemical extinguisher or a pressure water extinguisher be used on an electrical fire?
You would not want to use a pressure water extinguisher on any electrical fire due to the possibility of electricity being conducted through the water and injuring someone. A CO2, dry chemical or "clean agent" (e.g., "Halogenated") extinguisher would be a better choice for an electrical fire, knowing that dry chemical powder will make quite a mess.
What fire extinguisher do you use for a car fire?
A car extinguisher may be necessary for putting out several different types of fires, so it should be a Class A:B:C extinguisher, normally dry powder. For an irreplaceable classic, one might consider a CO2 or a "clean agent" extinguisher, to avoid the damage potential of dry powder chemical extinguishers.
What does a powder fire extinguisher put out?
wind
Health risks for breathing in dry fire extinguisher powder?
treatment for breathing in fire extinguisher power
What fire extinguisher would you use on a petrol fire?
Foam, dry powder or CO2 gas- a Class B extinguisher
Why can you put out the television fire by Dry powder fire extinguisher?
Because that is what the Dry powder (or Dry Chem.) is made for.
What can replace sodium bicarbonate in a fire extinguisher?
baking powder
What is hydrocarbon fire extinguisher?
BC type Dry powder extinguisher is the hydrocarbon extinguisher since it is used for extinguishing hydrocarbon fires.
What type of fire extinguisher should be used on a potassium and sodium fire?
powder or foam :)
Is it safe to use a water extinguisher on an electrical fire?
NO!!!!! Use a Dry Chemical extinguisher
A water extinguisher is safe to use on an electrical fire.?
NO!!!!! Use a Dry Chemical extinguisher
