2-Pentanone

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 Edit this at Wikidata
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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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]

  1. ^ a b c 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. Bibcode:2019IJT....40..102B. doi:10.1007/s10765-019-2570-9.
  2. ^ NIST Chemistry WebBook. http://webbook.nist.gov
  3. ^ a b c d e NIOSH Pocket Guide to Chemical Hazards. "#0488". National Institute for Occupational Safety and Health (NIOSH).
  4. ^ a b "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".