White Phosphorus (WP)

From GlobalSecurity.org (see here):

WP is a colorless to yellow translucent wax-like substance with a pungent, garlic-like smell. The form used by the military is highly energetic (active) and ignites once it is exposed to oxygen. White phosphorus is a pyrophoric material, that is, it is spontaneously flammable.

White phosphorus results in painful chemical burn injuries. The resultant burn typically appears as a necrotic area with a yellowish color and characteristic garliclike odor.

Incandescent particles of WP may produce extensive burns. Phosphorus burns on the skin are deep and painful; a firm eschar is produced and is surrounded by vesiculation. The burns usually are multiple, deep, and variable in size. The solid in the eye produces severe injury. The particles continue to burn unless deprived of atmospheric oxygen. Contact with these particles can cause local burns. These weapons are particularly nasty because white phosphorus continues to burn until it disappears. If service members are hit by pieces of white phosphorus, it could burn right down to the bone. Burns usually are limited to areas of exposed skin (upper extremities, face). Burns frequently are second and third degree because of the rapid ignition and highly lipophilic properties of white phosphorus.