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What (who) is pyrophorus - definition

PROPERTY OF A SUBSTANCE TO SPONTANEOUSLY IGNITE IN AIR WITHOUT HEATING

Pyrophorus; Pyrophoric chemical; Pyrophoric substance; Pyrophoric material; Pyrophoric

Pyrophorus

·noun Any one of several substances or mixtures which phosphoresce or ignite spontaneously on exposure to air, as a heated mixture of alum, potash, and charcoal, or a mixture of charcoal and finely divided lead.

Pyrophorus (beetle)

GENUS OF INSECTS

Pyrophorus (also known as fire beetles) is a genus of click beetle (family Elateridae). They are one of several genera in the tribe Pyrophorini, all of which are bioluminescent.

https://en.wikipedia.org/wiki/Pyrophorus_(beetle)

Pyrophoricity

A substance is pyrophoric (from , , 'fire-bearing') if it ignites spontaneously in air at or below (for gases) or within 5 minutes after coming into contact with air (for liquids and solids).GHS, seventh revised version.

https://en.wikipedia.org/wiki/Pyrophoricity

Wikipedia

Pyrophoricity

A substance is pyrophoric (from Greek: πυροφόρος, pyrophoros, 'fire-bearing') if it ignites spontaneously in air at or below 54 °C (129 °F) (for gases) or within 5 minutes after coming into contact with air (for liquids and solids). Examples are organolithium compounds and triethylborane. Pyrophoric materials are often water-reactive as well and will ignite when they contact water or humid air. They can be handled safely in atmospheres of argon or (with a few exceptions) nitrogen. Class D fire extinguishers are designated for use in fires involving pyrophoric materials. A related concept is hypergolicity, in which two compounds spontaneously ignite when mixed.

https://en.wikipedia.org/wiki/Pyrophoricity