Chlorine perchlorate

Chlorine perchlorate
Names
	IUPAC name Chloro perchlorate
	Systematic IUPAC name Chloro perchlorate
	Other names Chlorine(I,VII) oxide; Dichlorine tetroxide
Identifiers
CAS Number	27218-16-2 ;
3D model (JSmol)	Interactive image;
ChemSpider	147540 ;
PubChem CID	168667;
CompTox Dashboard (EPA)	DTXSID00181686 ;
	InChI InChI=1S/Cl2O4/c1-6-2(3,4)5 Key: JRONPIZRZBBOBR-UHFFFAOYSA-N ;
	SMILES ClO[Cl](=O)(=O)=O;
Properties
Chemical formula	Cl2O4
Molar mass	134.90 g·mol−1
Appearance	Pale green liquid
Density	1.81 g·cm−3
Melting point	−117 °C (−179 °F; 156 K)
Boiling point	20 °C (68 °F; 293 K) (decomposes)
Solubility in water	Reacts
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	oxidizer
	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

Chlorine perchlorate is a chemical compound with the formula Cl₂O₄. This chlorine oxide is an asymmetric oxide, with one chlorine atom in +1 oxidation state and the other +7, with proper formula ClOClO₃. It is produced by the photodimerization of chlorine dioxide (ClO₂) at room temperature by 436 nm ultraviolet light:

2ClO₂ → ClOClO₃

Chlorine perchlorate can also be made by the following reaction at −45 °C.

CsClO₄ + ClOSO₂F → Cs(SO₃)F + ClOClO₃

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