1,4-Dioxin

1,4-Dioxin
Names
	Preferred IUPAC name 1,4-Dioxine
	Systematic IUPAC name 1,4-Dioxacyclohexa-2,5-diene
	Other names 1,4-Dioxin; Dioxin; p-Dioxin; 1,4-Dioxa[6]annulene
Identifiers
CAS Number	290-67-5 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:134044;
ChemSpider	71301 ;
PubChem CID	78968;
UNII	ZD32358XMG ;
CompTox Dashboard (EPA)	DTXSID10183191 ;
	InChI InChI=1S/C4H4O2/c1-2-6-4-3-5-1/h1-4H Key: KVGZZAHHUNAVKZ-UHFFFAOYSA-N ; InChI=1/C4H4O2/c1-2-6-4-3-5-1/h1-4H Key: KVGZZAHHUNAVKZ-UHFFFAOYAD;
	SMILES O\1/C=C\O/C=C/1;
Properties
Chemical formula	C4H4O2
Molar mass	84.07 g/mol
Appearance	Colorless liquid
Boiling point	75 °C (167 °F; 348 K)
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	highly flammable
Related compounds
Related compounds	1,2-dioxin, dibenzodioxin; dithiin
	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

1,4-Dioxin (also referred as dioxin or p-dioxin) is a heterocyclic, organic, non-aromatic compound with the chemical formula C₄H₄O₂. There is an isomeric form of 1,4-dioxin, 1,2-dioxin (or o-dioxin). 1,2-Dioxin is very unstable due to its peroxide-like characteristics.

The term "dioxin" is most commonly used for a family of derivatives of 1,4-dioxin, known as polychlorinated dibenzodioxins (PCDDs).