Phosphine

• Phosphine is the compound with the chemical formula PH3. It is a colorless, flammable, toxic gas.
• Phosphine is used in semiconductor and plastic industries, in the production of a flame retardant, and as a pesticide in stored grain.
• Phosphine is used as a chemical dopant, fumigant and as a rodenticide (in the form of metal phosphides) and as a catalyst and in the production of polymers 
• Phosphine may be produced during the generation of acetylene gas.Phosphine is also used as a fumigant and a polymerization initiator.
• Phosphine does not stay in the environment or soil for long periods of time.
• Phosphine is the only widely used, cost effective, rapidly acting fumigant that does not leave residues on the stored product.