<unk>  (IUPAC name:<unk>  is a colorless, flammable, highly toxic compound with the chemical formula<unk> , classed as a pnictogen hydride. Pure<unk>  is odorless, but technical grade samples have a highly unpleasant odor like rotting fish, due to the presence of substituted<unk>  and diphosphane (P2H4). With traces of P2H4 present,<unk>  is spontaneously flammable in air (pyrophoric), burning with a luminous flame.<unk>  is a highly toxic respiratory poison, and is immediately dangerous to life or health at 50 ppm.<unk>  has a trigonal pyramidal structure.<unk>  is also the general name given to the class of organophosphorus compounds in which one or all of hydrogen atoms in<unk>  been replaced with organic derivative, having a general formula<unk> −nRn. Organophosphines are important in catalysts.
Phosphine
Phosphate
High-energy phosphate
Nitrate
Gluten
Saline 
Inositol
Chorus