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Hazard Class 3 within the hazard classification system specifically indicates flammable and combustible liquids. These substances can easily ignite, pose a significant fire risk due to their low flash points, and are typically contained in liquids that can emit flammable vapors. Understanding this classification is crucial for responders and safety personnel when dealing with hazardous materials, as it guides the appropriate responses to incidents involving these substances.

In emergencies, knowing a substance's hazard class helps inform necessary precautionary measures, handling techniques, and protective equipment. Due to their flammable nature, Class 3 liquids require careful storage, transportation, and management to prevent accidents and ensure safety at workplaces and during handling situations.