Selenium tetrachloride
IUPAC name	Selenium tetrachloride
Identifiers
CAS number	10026-03-6
PubChem	66205
RTECS number	VS7875000
SMILES	Cl[Se](Cl)(Cl)Cl
InChI InChI=1/Cl4Se/c1-5(2,3)4
Properties
Molecular formula	SeCl4
Molar mass	220.771 g/mol
Appearance	white to yellow crystals
Density	2.6 g/cm³, solid
Melting point	sublimes at 191.4°C
Solubility in water	decomposes in water
Structure
Crystal structure	Monoclinic, mS80
Space group	C12/c1, No. 15
Molecular shape	Seesaw (gas phase)
Hazards
EU classification	Toxic (T), Dangerous for the environment (N)
NFPA 704	0 3 0
R-phrases	R23/25, R33, R50/53
S-phrases	S20/21, S28, S45, S60, S61
Flash point	non-flammable
Related compounds
Other anions	Selenium tetrafluoride Selenium tetrabromide Selenium dioxide
Other cations	Dichlorine monoxide Sulfur tetrachloride Tellurium tetrachloride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Selenium tetrachloride, also selenious chloride, selenous chloride, or selenium(IV) chloride, is a chemical compound. Its chemical formula is SeCl₄. It contains selenium in its +4 oxidation state. It also contains chloride ions.