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
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.003.208
KEGG
RTECS number
  • CY1400000
UNII
  • InChI=1S/C5H10O/c1-3-4-5(2)6/h3-4H2,1-2H3 checkY
    Key: XNLICIUVMPYHGG-UHFFFAOYSA-N checkY
  • InChI=1/C5H10O/c1-3-4-5(2)6/h3-4H2,1-2H3
    Key: XNLICIUVMPYHGG-UHFFFAOYAJ
  • O=C(C)CCC
Properties
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)
6% (20°C)[3]
Vapor pressure 3.6 kPa (20 °C)
-57.41·10−6 cm3/mol
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):
1600 mg/kg (rat, oral)
1600 mg/kg (mouse, oral)[4]
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).
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Infobox references

References
  1. Baird, Zachariah Steven; Uusi-Kyyny, Petri; Pokki, Juha-Pekka; Pedegert, Emilie; Alopaeus, Ville (6 Nov 2019). "Vapor Pressures, Densities, and PC-SAFT Parameters for 11 Bio-compounds". International Journal of Thermophysics. 40 (11): 102. doi:10.1007/s10765-019-2570-9.
  2. NIST Chemistry WebBook. http://webbook.nist.gov
  3. NIOSH Pocket Guide to Chemical Hazards. "#0488". National Institute for Occupational Safety and Health (NIOSH).
  4. "2-Pentanone". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  5. Dieter Stoye (2007), "Solvents", Ullmann's Encyclopedia of Industrial Chemistry (7th ed.), Wiley, pp. 55–56
  6. T. C. Tso (2007), "Tobacco", Ullmann's Encyclopedia of Industrial Chemistry (7th ed.), Wiley, p. 19
  7. "WebExhibits: Methyl ketones".
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