White Phosphorus

In keeping with the major theme of chemical information - first Fluorine, then Mercury - now Phosphorus. Realize soaps and detergents all rely on phosphorus, which happens to be the limiting agent in metabolic nature. Credit to Mike Donnelly @ Counterpunch

What is white phosphorus?
White phosphorus is a solid, waxy man-made chemical which ignites spontaneously at about 30C and produces an intense heat, bright light and thick pillars of smoke. It continues to burn until deprived of oxygen and, if extinguished with water, can later reignite if the particles dry out and are exposed again to the air. Also known by the military as WP or Willy Pete, white phosphorus is used in munitions, to mark enemy targets and to produce smoke for concealing troop movements. It can also be used as an incendiary device to firebomb enemy positions.
What are its effects?
If particles of ignited white phosphorus land on a person's skin, they can continue to burn right through flesh to the bone. Toxic phosphoric acid can also be released into wounds, risking phosphorus poisoning. Skin burns must be immersed in water or covered with wet cloths to prevent re-combustion until the particles can be removed. Exposure to white phosphorus smoke in the air can also cause liver, kidney, heart, lung or bone damage and even death. A former US soldier who served in Iraq says breathing in smoke close to a shell caused the throat and lungs to blister until the victim suffocated, with the phosphorus continuing to burn them from the inside. Long-term exposure to lesser concentrations over several months or years may lead to a condition called "phossy jaw", where mouth wounds are caused that fail to heal and the jawbone eventually breaks down. SOURCE: BBC