SDS Section 5.1: Extinguishing Media

Section 5.1 of a Safety Data Sheet (SDS) provides critical information about suitable and unsuitable extinguishing media for firefighting. This information is essential for emergency responders and fire safety personnel to effectively and safely combat fires involving specific chemicals or products.

Firefighting media selection guide

Suitable Extinguishing Media

Recommended Media

  • Carbon dioxide (CO2)
  • Dry chemical powder
  • Alcohol-resistant foam
  • Water spray or fog (for cooling containers)

Application Guidelines

  • Water: Often suitable for Class A fires (ordinary combustibles)
  • Foam: Effective for Class B fires (flammable liquids) and some Class A fires
  • Dry Chemical Powder: Versatile, suitable for Classes A, B, and C (electrical) fires
  • Carbon Dioxide (CO2): Ideal for Class C fires and some Class B fires
  • Specific Chemical Agents: Tailored for particular types of fires or materials

Unsuitable Extinguishing Media

Never Use

  • Direct water jet - may spread fire
  • High volume water jet
  • Any method that may splash or scatter material
  • Water on electrical fires (risk of electrocution)
  • Water on oil or grease fires (can cause splashing and spread the fire)
  • Water on certain reactive metals (may produce flammable hydrogen gas)

Selection Criteria

Key Considerations

  • Consider surrounding materials and fire conditions
  • Use appropriate media for the size of fire
  • Consider environmental impact of extinguishing agents
  • Account for chemical reactivity with extinguishing media

Special Considerations

Product-Specific Approaches

  • Non-combustible products: For products that are not combustible themselves, follow guidance on extinguishing surrounding fires.
  • Reactive substances: Consider potential chemical reactions with extinguishing agents.
  • Environmental concerns: Be aware if certain extinguishing methods could lead to environmental contamination.

Additional Precautions

  • Keep containers cool with water spray
  • Apply extinguishing media carefully to avoid spreading fire
  • Consider wind direction when applying extinguishing agents
  • Have backup extinguishing methods available

Guidance for Firefighters

Critical Safety Measures

  • Always approach fire from upwind direction
  • Consider possible toxic fumes when selecting breathing apparatus
  • Use water spray to cool containers and prevent explosion
  • Wear appropriate personal protective equipment (PPE)
  • Be aware of specific hazards that may arise during firefighting efforts

Importance of Accurate Information

Key Points

  • Ensures effective fire suppression
  • Prevents accidental worsening of the fire situation
  • Protects firefighters and emergency responders from unexpected reactions
  • Complies with regulatory requirements for hazard communication