Selenium monochloride

Selenium monochloride, also known as selenium(I) chloride or diselenium dichloride, is a chemical compound made of selenium and chlorine. Its chemical formula is Se₂Cl₂.

Selenium monochloride

Names
IUPAC name Selenium monochloride
Other names Dichlorodiselenide, Diselenium dichloride, Selenium chloride, 1,2-dichlorodiselane
Identifiers
CAS Number	10025-68-0 Y
ECHA InfoCard	100.030.022
CompTox Dashboard (EPA)	DTXSID1064902
Properties
Chemical formula	Se2Cl2
Molar mass	228.83 g/mol
Appearance	Reddish-brown oily liquid
Density	2.7741 g/cm3
Melting point	-85 °C (223.15 K)
Boiling point	127 °C at 0.997 atm (400.15 K at 0.997 atm)
Solubility in water	insoluble; sol in CHCl3, CS2, MeCN
Solubility	Soluble in dry chloroform and carbon disulfide
Hazards
R-phrases	23/24/25-34
S-phrases	22-26-36/37/39-45
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Properties

It is a reddish brown oily liquid.

Preparation

It can be made by reacting selenium, selenium dioxide, and hydrochloric acid. It can be made though by just reacting chlorine with selenium. Another way to make it is reacting oleum and hydrochloric acid with selenium.

Uses

It can be used to add selenium to other chemical compounds.

Related pages

• Selenium(IV) chloride