2-Pentanone

2-Pentanone or methyl propyl ketone (MPK) is a ketone and solvent of minor importance. It is comparable to methyl ethyl ketone, but has a lower solvency and is more expensive.^[5] It occurs naturally in Nicotiana tabacum (Tobacco)^[6] and blue cheese as a metabolic product of Penicillium mold growth.^[7]

2-Pentanone

Skeletal formula of 2-pentanone
Ball-and-stick model of 2-pentanone
Names
Preferred IUPAC name Pentan-2-one
Other names methyl propyl ketone 2-pentanone MPK
Identifiers
CAS Number	107-87-9 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:16472 Y
ChEMBL	ChEMBL45345 Y
ChemSpider	7607 Y
ECHA InfoCard	100.003.208
KEGG	C01949 Y
PubChem CID	7895
RTECS number	CY1400000
UNII	I97392I10V Y
CompTox Dashboard (EPA)	DTXSID0021888
InChI InChI=1S/C5H10O/c1-3-4-5(2)6/h3-4H2,1-2H3 Y Key: XNLICIUVMPYHGG-UHFFFAOYSA-N Y InChI=1/C5H10O/c1-3-4-5(2)6/h3-4H2,1-2H3 Key: XNLICIUVMPYHGG-UHFFFAOYAJ
SMILES O=C(C)CCC
Properties
Chemical formula	C5H10O
Molar mass	86.13 g/mol
Appearance	Colorless liquid
Odor	resembling acetone
Density	0.8062 g/ml (20 °C) [1]
Melting point	−78 °C (−108 °F; 195 K)
Boiling point	102[2][1] °C (216 °F; 375 K)
Solubility in water	6% (20°C)[3]
Vapor pressure	3.6 kPa (20 °C)
Magnetic susceptibility (χ)	−57.41·10−6 cm3/mol
Refractive index (nD)	1.3903 (20 °C) [1]
Viscosity	0.50 mPa·s (20 °C)
Hazards
Flash point	10 °C (50 °F; 283 K)
Explosive limits	1.5–8.2%[3]
Lethal dose or concentration (LD, LC):
LD50 (median dose)	1600 mg/kg (rat, oral) 1600 mg/kg (mouse, oral)[4]
LCLo (lowest published)	50,000 ppm (guinea pig, 50 min) 13,000 ppm (guinea pig, 5 hr)[4]
NIOSH (US health exposure limits):
PEL (Permissible)	TWA 200 ppm (700 mg/m3)[3]
REL (Recommended)	TWA 150 ppm (530 mg/m3)[3]
IDLH (Immediate danger)	1500 ppm[3]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references