Pyrophoric materials are substances that ignite spontaneously in air at or below room temperature. These materials can include certain metals, such as iron and aluminum, as well as some chemical compounds. When exposed to oxygen, they can produce enough heat to catch fire without any external ignition source. Due to their reactive nature, pyrophoric materials require careful handling and storage. They are often used in various industries, including aerospace and chemical manufacturing, where their unique properties can be beneficial. Proper safety measures, such as inert gas environments, are essential to prevent accidental ignition.