Hydrogen selenide

Hydrogen selenide
Structural diagram of the hydrogen selenide molecule	Space-filling model of the hydrogen selenide molecule
Names
	IUPAC name Hydrogen selenide
	Other names Hydroselenic acid; selane; selenium hydride
Identifiers
CAS Number	7783-07-5 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:16503 ;
ChemSpider	518 ;
ECHA InfoCard	100.029.071
KEGG	C01528 ;
PubChem CID	533;
RTECS number	X1050000;
UNII	V91P54KPAM ;
UN number	2202
CompTox Dashboard (EPA)	DTXSID20872822 ;
	SMILES [SeH2];
Properties
Chemical formula	H2Se
Molar mass	80.98 g/mol
Appearance	Colorless gas
Odor	decayed horseradish
Density	3.553 g/dm3
Melting point	−65.73 °C (−86.31 °F; 207.42 K)
Boiling point	−41.25 °C (−42.25 °F; 231.90 K)
Solubility in water	0.70 g/100 mL
Solubility	soluble in CS2, phosgene
Vapor pressure	9.5 atm (21°C)
Acidity (pKa)	3.89
Conjugate acid	Selenonium
Conjugate base	Selenide
Structure
Molecular shape	Bent
Hazards
EU classification	F+ T+ N
Main hazards	Extremely toxic and flammable
	4 4 0
R-phrases	R23/25, R33, R50/53
S-phrases	(S1/2), S20/21, S28, S45, S60, S61
Flash point	flammable gas
U.S. Permissible; exposure limit (PEL)	TWA 0.05 ppm (0.2 mg/m3)
Related compounds
Other anions	H2O; H2S; H2Te; H2Po
Other cations	Na2Se; Ag2Se
	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

Hydrogen selenide, also known as hydroselenic acid, selenium hydride, or selane, is a chemical compound. Its chemical formula is H₂Se. It is an acid. It contains hydrogen and selenide ions.

↑ ^1.0 ^1.1 ^1.2 NIOSH Pocket Guide to Chemical Hazards. "#0336". National Institute for Occupational Safety and Health (NIOSH).

[PGCH-1] 1.0 ^1.1 ^1.2 NIOSH Pocket Guide to Chemical Hazards. "#0336". National Institute for Occupational Safety and Health (NIOSH).

[1]