Diphosphane

Diphosphane
Stereo structural formula of diphosphane with explicit hydrogens	Ball-and-stick model of diphosphane
Names
	IUPAC name Diphosphane
	Systematic IUPAC name Diphosphane (substitutive); Tetrahydridodiphosphorus(P—P) (additive)
	Other names Diphosphine
Identifiers
CAS Number	13445-50-6 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:35880 ;
ChemSpider	122832 ;
PubChem CID	139283;
CompTox Dashboard (EPA)	DTXSID40924074 ;
	InChI InChI=1S/H4P2/c1-2/h1-2H2 Key: VURFVHCLMJOLKN-UHFFFAOYSA-N ;
	SMILES PP;
Properties
Chemical formula	H4P2
Molar mass	65.980 g·mol−1
Melting point	−99 °C (−146 °F; 174 K)
Boiling point	63.5 °C (146.3 °F; 336.6 K) (Extrapolated, decomposes)
Related compounds
Other anions	ammonia; hydrazine; triazane
Other cations	diphosphines
Related Binary Phosphorus halides	diphosphorus tetrafluoride; diphosphorus tetrachloride; diphosphorus tetrabromide; diphosphorus tetraiodide
Related compounds	phosphane; triphosphane; diphosphene; diphosphenes
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Diphosphane, or diphosphine, is an inorganic compound with the chemical formula P₂H₄. This colourless liquid is one of several binary phosphorus hydrides. It is the impurity that typically causes samples of phosphine to ignite in air.