Hydrogen selenide facts for kids

Quick facts for kids Hydrogen selenide
IUPAC name	Hydrogen selenide
Other names	Hydroselenic acid selane selenium hydride
Identifiers
CAS number	7783-07-5
PubChem	533
KEGG	C01528
ChEBI	CHEBI:16503
RTECS number	X1050000
SMILES	[SeH2]
InChI InChI=1/H2Se/h1H2
Properties
Molecular formula	H2Se
Molar mass	80.98 g/mol
Appearance	Colorless gas
Odor	horseradish
Density	3.553 g/cm3
Melting point	-65.73 °C, 207 K, -86 °F
Boiling point	-41.25 °C, 232 K, -42 °F
Solubility in water	0.70 g/100 mL
Solubility	soluble in CS2, phosgene
Acidity (pKa)	3.89
Structure
Molecular shape	Bent
Hazards
MSDS	ICSC 0284
EU classification	Highly Flammable (F+) Toxic (T) Dangerous for the environment (N)
EU Index	034-002-00-8
NFPA 704	4 4 0
R-phrases	R23/25, R33, R50/53
S-phrases	(S1/2), S20/21, S28, S45, S60, S61
Flash point	flammable gas
Related compounds
Other anions	H2O H2S H2Te H2Po
Other cations	Na2Se Ag2Se
Related compounds	Arsine
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

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.

Properties

Hydrogen selenide is a colorless gas that dissolves in water to make an acidic solution. It smells like rotten horseradish. It is very toxic. It burns easily, making selenium dioxide. It is similar to hydrogen sulfide, a gas that smells like rotten eggs. It is a strong reducing agent.

Preparation

Hydrogen selenide can be made by hydrolysis of aluminium selenide. This reaction also makes aluminium hydroxide. It can be made by reacting hydrogen with powdered selenium at a high temperature.

Uses

It can be used to add selenide ion to organic compounds. It can also be used to make selenium by reacting it with sulfur dioxide. This makes selenium, sulfur, and water.

Related pages

• Selenous acid
• Selenic acid

See also

In Spanish: Seleniuro de hidrógeno para niños