Tags: Chemical Compound, Chemical Substance.
Phosphine (IUPAC name: phosphane) is the compound with the chemical formula PH3. It is a colorless flammable toxic gas. Pure phosphine is odorless but technical grade samples have a highly unpleasant odor like garlic or rotting fish due to the presence of substituted phosphine and diphosphane (P2H4). With traces of P2H4 present PH3 is spontaneously flammable in air burning with a luminous flame.
