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A large compost pile can spontaneously combust if improperly managed. Spontaneous combustion or spontaneous ignition is a type of combustion which occurs by self-heating (increase in temperature due to exothermic internal reactions), followed by thermal runaway (self heating which rapidly accelerates to high temperatures) and finally, autoignition. [1]
Articles containing a substance liable to spontaneous combustion, not otherwise specified UN 3543: 4.3: Articles containing a substance which emits flammable gas in contact with water, not otherwise specified UN 3544: 5.1: Articles containing oxidizing substance, not otherwise specified UN 3545: 5.2
Substances liable to spontaneous combustion – Substances which are liable to spontaneous heating under normal conditions encountered in transport, or to heating up in contact with air, and being then liable to catch fire e.g. manganese heptoxide. Division 4.2
The autoignition temperature or self-ignition temperature, often called spontaneous ignition temperature or minimum ignition temperature (or shortly ignition temperature) and formerly also known as kindling point, of a substance is the lowest temperature at which it spontaneously ignites in a normal atmosphere without an external source of ignition, such as a flame or spark. [1]
Spontaneous combustion of grass or manure piles causes numerous fires each year. Moisture in wet hay piles fosters microorganism growth, which generates heat as they decompose the organic material.
Combustibility is a measure of how easily a substance bursts into flame, through fire or combustion. This is an important property to consider when a substance is used for construction or is being stored. It is also important in processes that produce combustible substances as a by-product. Special precautions are usually required for ...
Class 4.1 Flammable solids, self-reactive substances, and solid desensitized explosives; Class 4.2 Substances liable to spontaneous combustion; Class 4.3 Substances which, in contact with water, emit flammable gases; Class 5.1 Oxidizing substances; Class 5.2 Organic peroxides; Class 6.1 Toxic substances; Class 6.2 Infectious substances
The creation of sparks from metals is based on the pyrophoricity of small metal particles, and pyrophoric alloys are made for this purpose. [2] Practical applications include the sparking mechanisms in lighters and various toys, using ferrocerium; starting fires without matches, using a firesteel; the flintlock mechanism in firearms; and spark testing ferrous metals.