flammable solid
Definition
Any solid, other than an explosive or blasting agent, that can catch fire (1) through friction, (2) absorption of moisture, (3) spontaneous chemical change, (4) heat retained from a manufacturing or other process, or (5) which can be ignited easily and, when ignited, burns so vigorously or persistently as to create a serious fire hazard.
News containing the term flammable solid
http://www.businessdictionary.com/definition/flammable-solid.html

