Explosive oxygen burning, potassium

Picric acid contains oxygen, and is a strong explosive. It burns in the air with a flamis generating a small amount of soot which is caused by the insufficiency of oxygen in it. It is used for increasing the brilliancy of a flame by the radiation of the carbon particles, but for this purpose it may be replaced by lampblack or camphor. It is said that picric acid in combination with potassium chlorate or potassium nitrate produces chloric acid or nitric acid, which can cause spontaneous ignition. 

ZIRCAT (7440-67-7) Finely divided material is spontaneously flammable in air may ignite and continue to bum under water. Violent reactions with oxidizers, alkali hydroxides, alkali metals (and their compounds), carbon tetrachloride, cupric oxide, lead, lead oxide, lead peroxide (combined material can burn explosively, and is sensitive to friction and static electricity), nitryl fluoride, oxygen difluoride, phosphoms, potassium, potassium compounds (potassium chlorate, potassium nitrate), sodium borate, sodium hydroxide. Explodes if mixed with hydrated borax when heated. Contact with lithium chromate may cause explosion above 752°F/450°C. Forms explosive mixture with potassium chlorate. Dusts of zirconium ignite and explode in a carbon dioxide atmosphere. Contact with ammonium-V-nitrosophenylhydroxylamine above 104°F/40°C forms an explosive material. Incompatible with boron, carbon, nitrogen, halogens, lead, platinum, potassium nitrate. In case of fire, use approved Class D extinguishers or smothering quantities of dry sand, crushed limestone, clay. 

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