3-Methyl-3-penten-2-one

3-Methyl-3-penten-2-one
Names
	Preferred IUPAC name 3-Methylpent-3-en-2-one
Identifiers
CAS Number	565-62-8 ;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL3184903;
ChemSpider	4516728;
ECHA InfoCard	100.008.440
EC Number	209-283-7;
PubChem CID	5364579;
UNII	70TS08S754 ;
CompTox Dashboard (EPA)	DTXSID4041490 ;
	InChI InChI=1S/C6H10O/c1-4-5(2)6(3)7/h4H,1-3H3/b5-4+ Key: ZAMCMCQRTZKGDX-SNAWJCMRSA-N;
	SMILES C/C=C(\C)/C(=O)C;
Properties
Chemical formula	C6H10O
Molar mass	98.145 g·mol−1
Appearance	Clear liquid
Density	0.875 g/cm3 (at 20 °C)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H226, H302, H312, H315, H319, H331, H332, H335
Precautionary statements	P210, P233, P240, P241, P242, P243, P261, P264, P270, P271, P280, P301+P312, P302+P352, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P311, P312, P321, P322, P330, P332+P313, P337+P313, P362, P363, P370+P378, P403+P233, P403+P235, P405, P501
Flash point	34 °C (93 °F) (closed cup)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

3-Methyl-3-penten-2-one is an unsaturated aliphatic ketone. It is an isomer of mesityl oxide and isomesityl oxide. It is a precursor of 3-methyl-2-pentanone (methyl sec-butyl ketone) and is obtained by acid-catalyzed dehydration of 4-hydroxy-3-methyl-2-pentanone. It is used as an intermediate in organic chemistry syntheses.^[1]

References

^ Hardo Siegel, Manfred Eggersdorfer (2007), "Ketones", Ullmann's Encyclopedia of Industrial Chemistry (7th ed.), Wiley, p. 5

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