Pyrophoric materials are substances that ignite instantly upon exposure to oxygen. They can also be water-reactive, where heat and hydrogen (a flammable gas) are produced. Other common hazards include ...

pyrophoric gas, or hazard not otherwise classified. The full definition of these substances can be found in 29 CFR 1910.1200(c), adopted by reference into MIOSAH Part 92, the Hazard Communication ...

In addition, lab members must understand their role in fire prevention and following procedures related to fire safety when using pyrophoric chemicals, flammable gases and working within laboratory ...

Four workers died when flammable gases ignited in a storage container ... or by incoming air mixing with pyrophoric substances which can "ignite spontaneously on exposure to air".