Pyrophoric materials can ignite when they come in contact with:

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Multiple Choice

Pyrophoric materials can ignite when they come in contact with:

Explanation:
Pyrophoric materials ignite spontaneously in the presence of oxygen. When they meet air, the surface oxidizes rapidly, releasing heat enough to keep burning without any external flame or heat source. That makes exposure to air the defining hazard for these substances. While some pyrophoric substances can react violently with water or acids, the reliable ignition mechanism everyone must guard against is contact with air.

Pyrophoric materials ignite spontaneously in the presence of oxygen. When they meet air, the surface oxidizes rapidly, releasing heat enough to keep burning without any external flame or heat source. That makes exposure to air the defining hazard for these substances. While some pyrophoric substances can react violently with water or acids, the reliable ignition mechanism everyone must guard against is contact with air.

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