Phosphorus combines with hydrogen to form the compound phosphine (phosphorus hydride) with the molecular formula PH3.

The compound is widely used as an insecticide. Together with Methyl Bromide it is in a class of insecticide known as a fumigants (Poisonous Mist Sprays). Fumigants are used in enclosed systems that is to say they are useful in removing storage pests. Phosphine is is also the basis for a class of chemical knowns as Organaphosphates. These chemical compounds are organophosphorus compounds containing carbon-phosphorus bonds. Organophosphorus compounds have been developed as an alternative to Organochlorine compounds.