Tetraborane

Tetraborane
Names
	IUPAC names tetraborane(10); arachno-B4H10
Identifiers
CAS Number	18283-93-7 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:33592 ;
ChemSpider	21865171 ;
Gmelin Reference	49820
UNII	56X8JUK4Q7 ;
CompTox Dashboard (EPA)	DTXSID101317104 ;
	InChI InChI=1S/B4H10/c5-1-3(5)2(7-3)4(1,3,6-1)8-2/h3-4H,1-2H2 Key: WEYOKDYZYYMRSQ-UHFFFAOYSA-N ; InChI=1/B4H10/c5-1-3(5)2(7-3)4(1,3,6-1)8-2/h3-4H,1-2H2 Key: WEYOKDYZYYMRSQ-UHFFFAOYAQ;
	SMILES [H]B123([H])[H]B145([H])[H]B41([H])([H])[H]B215([H])[H]3;
Properties
Chemical formula	B4H10
Molar mass	53.32 g/mol
Appearance	colourless gas
Density	2.3 kg m−3 (gas)
Melting point	−120.8 °C (−185.4 °F; 152.3 K)
Boiling point	18 °C (64 °F; 291 K)
Hazards
NFPA 704 (fire diamond)	4 4 3 W
	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

Tetraborane (systematically named arachno-tetraborane(10)) was the first boron hydride compound to be discovered. It was classified by Alfred Stock and Carl Massenez in 1912 and was first isolated by Stock. It has a relatively low boiling point at 18 °C and is a gas at room temperature. Tetraborane gas is foul smelling and toxic.