Butanone

Butanone^[1]
Ball-and-stick model of butanone	Space-filling model of butanone
Names
	Preferred IUPAC name Butan-2-one
	Other names Ethyl methyl ketone; Ethylmethylketone; Methyl ethyl ketone (MEK; deprecated); Methylpropanone; Methylacetone;
Identifiers
CAS Number	78-93-3 ;
3D model (JSmol)	Interactive image; Interactive image;
Beilstein Reference	741880
ChEBI	CHEBI:28398 ;
ChEMBL	ChEMBL15849 ;
ChemSpider	6321 ;
ECHA InfoCard	100.001.054
Gmelin Reference	25656
KEGG	C02845 ;
PubChem CID	6569;
RTECS number	EL6475000;
UNII	6PT9KLV9IO ;
CompTox Dashboard (EPA)	DTXSID3021516 ;
	SMILES O=C(C)CC; CCC(=O)C;
Properties
Chemical formula	C4H8O
Molar mass	72.11 g·mol−1
Appearance	Colorless liquid
Odor	Mint or acetone-like
Density	0.8050 g/mL
Melting point	−86 °C (−123 °F; 187 K)
Boiling point	79.64 °C (175.35 °F; 352.79 K)
Solubility in water	27.5 g/100 mL
log P	0.37
Vapor pressure	78 mmHg (20 °C)
Acidity (pKa)	14.7
Magnetic susceptibility (χ)	−45.58·10−6 cm3/mol
Refractive index (nD)	1.37880
Viscosity	0.43 cP
Structure
Dipole moment	2.76 D
Hazards
NFPA 704 (fire diamond)	1 3 0
Flash point	−9 °C (16 °F; 264 K)
Autoignition; temperature	505 °C (941 °F; 778 K)
Explosive limits	1.4–11.4%
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	2737 mg/kg (oral, rat); 4050 mg/kg (oral, mouse);
LC50 (median concentration)	12667 ppm (mammal); 13333 ppm (mouse, 2 hr); 7833 ppm (rat, 8 hr);
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 200 ppm (590 mg/m3)
REL (Recommended)	TWA 200 ppm (590 mg/m3) ST 300 ppm (885 mg/m3)
IDLH (Immediate danger)	3000 ppm
Related compounds
Related ketones	Acetone; 3-pentanone; 3-methylbutanone
	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

Butanone, also called methyl ethyl ketone (MEK), is an organic compound with the chemical formula C H₃C(O)CH₂CH₃. It is a simple ketone with four carbon atoms. It smells sharp and sweet, like butterscotch and acetone mixed. It is soluble in water and is used as a solvent.

References

↑ Merck Index, 11th Edition, 5991.
1 2 3 Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 725. doi:10.1039/9781849733069-FP001. ISBN 978-0-85404-182-4.
1 2 3 4 5 6 NIOSH Pocket Guide to Chemical Hazards. "#0069". National Institute for Occupational Safety and Health (NIOSH).
↑ "butan-2-one_msds".
1 2 Template:IDLH

[1] Merck Index, 11th Edition, 5991.

[iupac2013-2] 1 2 3 Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 725. doi:10.1039/9781849733069-FP001. ISBN 978-0-85404-182-4.

[PGCH-3] 1 2 3 4 5 6 NIOSH Pocket Guide to Chemical Hazards. "#0069". National Institute for Occupational Safety and Health (NIOSH).

[chemsrc-4] "butan-2-one_msds".

[IDLH-5] 1 2 Template:IDLH

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