Purple K
Dry Chemical Extinguishing Agent

Fast. Efficient. Environmentally friendly.

Kidde strives to recognize the environmental impacts of extinguishing agents. Our solution is Purple K, a fast, efficient, environmentally friendly fire suppression agent.

It is a potassium bicarbonate based dry chemical agent that extinguishes by changing flame chemistry and cooling. Purple K suppresses Class B (petroleum, oil, lubricant) and Class C (electrical) fires by interrupting a fire's chemical reaction and cooling the flame/hot surfaces (endothermic reactions and surface cooling).

In comparison to water-based extinguishing agents, water is undesirable for a Class B fire because it can spread the flames, and it is undesirable for a Class C fire due to potential shock hazards.

Comparison of Purple K to Other Agents

Key Features

  • Total flooding characteristics allowing for fewer discharge nozzles & more effective distribution
  • High density & efficiency, allowing a lower mass to be used vs. other agents
  • Provides coating over surfaces to minimize re-strike risk
  • Stays in powder form when exposed to hot surfaces
  • Easy to clean
  • Non-corrosive
  • Non-conductive
  • Wider operational temperature range of -40°C to 100°C


Kidde Bus Fire Suppression System Demonstration