1,2-Benzoquinone

1,2-Benzoquinone
Names
	Preferred IUPAC name Cyclohexa-3,5-diene-1,2-dione
	Other names ortho-Benzoquinone; o-Benzoquinone; o-Quinone;
Identifiers
CAS Number	583-63-1 ;
3D model (JSmol)	Interactive image; Interactive image;
ChEBI	CHEBI:17253 ;
ChemSpider	10941 ;
ECHA InfoCard	100.243.463
KEGG	C02351 ;
PubChem CID	11421;
UNII	SVD1LJ47R7 ;
CompTox Dashboard (EPA)	DTXSID60894765 ;
	InChI InChI=1S/C6H4O2/c7-5-3-1-2-4-6(5)8/h1-4H Key: WOAHJDHKFWSLKE-UHFFFAOYSA-N ; InChI=1/C6H4O2/c7-5-3-1-2-4-6(5)8/h1-4H Key: WOAHJDHKFWSLKE-UHFFFAOYAR;
	SMILES O=C1/C=C\C=C/C1=O; C1=CC(=O)C(=O)C=C1;
Properties
Chemical formula	C6H4O2
Molar mass	108.096 g·mol−1
Appearance	Red volatile solid
Density	1.424 g/cm3
Melting point	60–70 °C (140–158 °F; 333–343 K) decomposes
Hazards
Flash point	76.4 °C (169.5 °F; 349.5 K)
Related compounds
Related compounds	1,4-benzoquinone ; quinone
	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

1,2-Benzoquinone, also called ortho-benzoquinone, is an organic compound with formula C₆H₄O₂. It is one of the two isomers of quinone, the other being 1,4-benzoquinone. It is a red volatile solid that is soluble in water and ethyl ether. It is rarely encountered because of its instability, but it is of fundamental interest as the parent compound of many derivatives which are known.^[3]^[4]

^ Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 728. doi:10.1039/9781849733069-FP001. ISBN 978-0-85404-182-4.
^ Eagleson, Mary (1994). Concise encyclopedia chemistry. Berlin: Walter de Gruyter. p. 123. ISBN 0-89925-457-8. OCLC 29029713.
^ Patai, Saul, ed. (1974). Quinonoid Compounds: Vol. 1 (1974). PATAI'S Chemistry of Functional Groups. doi:10.1002/9780470771297. ISBN 9780470771297.
^ Patai, Saul, ed. (1974). Quinonoid Compounds: Vol. 2 (1974). PATAI'S Chemistry of Functional Groups. doi:10.1002/9780470771303. ISBN 9780470771303.

[IUPAC2013_728-1] Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 728. doi:10.1039/9781849733069-FP001. ISBN 978-0-85404-182-4.

[2] Eagleson, Mary (1994). Concise encyclopedia chemistry. Berlin: Walter de Gruyter. p. 123. ISBN 0-89925-457-8. OCLC 29029713.

[3] Patai, Saul, ed. (1974). Quinonoid Compounds: Vol. 1 (1974). PATAI'S Chemistry of Functional Groups. doi:10.1002/9780470771297. ISBN 9780470771297.

[4] Patai, Saul, ed. (1974). Quinonoid Compounds: Vol. 2 (1974). PATAI'S Chemistry of Functional Groups. doi:10.1002/9780470771303. ISBN 9780470771303.

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1,2-Benzoquinone

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