is a highly sensitive primary explosive
. Its primary ingredients are red phosphorus
and strong oxidizer, such as potassium chlorate
and potassium perchlorate
is used to substitute for some or all of the phosphorus to slightly decrease sensitivity and lower costs; calcium carbonate
may also be present in small proportions. Commercially, Armstrong's mixture is used in milligram quantities on the paper caps in toy cap guns
and in party poppers
It has also been considered a suitable mixture for the primer used in guns after boron carbide has been added, and was used during the Second World War.
Because of its sensitivity to shock, friction and flame, Armstrong's mixture is an extremely dangerous explosive. Only about 10 mg of it is used per item of consumer fireworks. Depending on composition, conditions and quantity, Armstrong's mixture can explode violently in an enclosed space.
This page was last edited on 27 February 2018, at 00:36.
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