Which Carbon Compound is used as fire extinguisher?

The correct answer is CCI4.

Key Points

• Carbon tetrachloride (CCI4) is commonly used in fire extinguishers, particularly in older models.
• CCI4 is effective in extinguishing fires because it is a non-flammable liquid that can inhibit the chemical reactions occurring in a flame.
• It was extensively used in fire extinguishers designed for electrical fires and liquid fires (Class B and C fires).
• Despite its effectiveness, the use of CCI4 has declined due to its toxic and potentially carcinogenic effects.

Additional Information

• Types of Fire Extinguishers
  • Water Extinguishers: Used for Class A fires involving ordinary combustibles like wood and paper.
  • Foam Extinguishers: Effective on Class A and B fires involving flammable liquids.
  • Dry Powder Extinguishers: Suitable for Class A, B, and C fires, used for a wide range of fire types.
  • CO2 Extinguishers: Ideal for electrical fires and flammable liquid fires (Class B and C).
• Fire Extinguisher Classes
  • Class A: Fires involving solid combustibles like wood, paper, and textiles.
  • Class B: Fires involving flammable liquids such as petrol and paint.
  • Class C: Fires involving gases like propane and butane.
  • Class D: Fires involving metals such as magnesium and aluminum.
  • Class K: Fires involving cooking oils and fats.
• Health Risks of CCI4
  • CCI4 can cause liver and kidney damage upon prolonged exposure.
  • It is classified as a probable human carcinogen by the International Agency for Research on Cancer (IARC).
  • Inhalation of CCI4 vapors can lead to central nervous system depression.
• Modern Fire Extinguishers
  • Due to the health risks associated with CCI4, modern fire extinguishers use less toxic and more environmentally friendly agents.
  • Halons and Halocarbons are commonly used in place of CCI4 for electrical and flammable liquid fires.