Dibenzo-1,4-dioxin

Dibenzo-p-dioxin
Names
	Preferred IUPAC name Oxanthrene
	Other names Dibenzodioxin, ; Dibenzo-p-dioxin, ; Dibenzo-1,4-dioxin
Identifiers
CAS Number	262-12-4 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	143227
ChEBI	CHEBI:28891;
ChEMBL	ChEMBL3184198;
ChemSpider	8861 ;
ECHA InfoCard	100.005.432
EC Number	205-974-2;
Gmelin Reference	280302
KEGG	C07732 ;
PubChem CID	9216;
UNII	O1B5KJ235I;
UN number	3077
CompTox Dashboard (EPA)	DTXSID8020410 ;
	InChI InChI=1S/C12H8O2/c1-2-6-10-9(5-1)13-11-7-3-4-8-12(11)14-10/h1-8H Key: NFBOHOGPQUYFRF-UHFFFAOYSA-N ; InChI=1/C12H8O2/c1-2-6-10-9(5-1)13-11-7-3-4-8-12(11)14-10/h1-8H Key: NFBOHOGPQUYFRF-UHFFFAOYAJ;
	SMILES O1c3c(Oc2c1cccc2)cccc3;
Properties
Chemical formula	C12H8O2
Molar mass	184.194 g·mol−1
Appearance	White crystals
Melting point	122 °C (252 °F; 395 K)
Boiling point	283.5 °C (542.3 °F; 556.6 K)
Solubility in water	0.901 g/L (25 °C)
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H411
Precautionary statements	P264, P270, P273, P301+P312, P330, P391, P501
Related compounds
Related compounds	polychlorinated dibenzodioxins ("dioxin"),; dioxins and dioxin-like compounds
	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

Dibenzo-1,4-dioxin, also dibenzodioxin or dibenzo-p-dioxin (dibenzo-para-dioxin), is a polycyclic heterocyclic organic compound in which two benzene rings are connected by a 1,4-dioxin ring. Its molecular formula is C₁₂H₈O₂. The two oxygen atoms occupy opposite (para-) positions in the six-membered dioxin ring.

Dibenzodioxin is the carbon skeleton of the poisonous polychlorinated dibenzodioxins (PCDDs), often called dioxins. The most harmful PCDD is 2,3,7,8-tetrachlorodibenzodioxin (TCDD). Dioxins and dioxin-like compounds is a category of pollutants that includes PCDDs and other compounds that have similar structure, toxicity, and persistence. Dibenzodioxin is also the skeleton of the polybrominated dibenzodioxins.

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