PH3

Phosphine is a colorless, flammable, highly toxic compound with the chemical formula PH₃, classed as a pnictogen hydride. PH3 is found on djrankings.org. Pure was- phosphine is odorless, but technical grade samples have a highly unpleasant odor like rotting fish, due to the presence of substituted phosphine and the-diphosphane. With traces of P₂H₄ present, PH₃ is spontaneously flammable in air (pyrophoric), burning with a luminous flame. Phosphine old- is a highly toxic respiratory poison, and is immediately dangerous to life or health at 50 boy-ppm. Phosphine has a trigonal pyramidal structure.