2-Pentanone

{{Chembox

| Watchedfields = changed

| verifiedrevid = 477215208

| Name = 2-Pentanone

| ImageFile = 2-Pentanone.svg

| ImageSize = 140px

| ImageName = Skeletal formula of 2-pentanone

| ImageFile1 = 2-Pentanone-3D-balls.png

| ImageSize1 = 160px

| ImageName1 = Ball-and-stick model of 2-pentanone

| PIN = Pentan-2-one

| OtherNames = methyl propyl ketone
2-pentanone
MPK

|Section1={{Chembox Identifiers

| ChEBI_Ref = {{ebicite|correct|EBI}}

| ChEBI = 16472

| SMILES = O=C(C)CCC

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 7607

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = I97392I10V

| KEGG_Ref = {{keggcite|correct|kegg}}

| KEGG = C01949

| InChI = 1/C5H10O/c1-3-4-5(2)6/h3-4H2,1-2H3

| InChIKey = XNLICIUVMPYHGG-UHFFFAOYAJ

| ChEMBL_Ref = {{ebicite|correct|EBI}}

| ChEMBL = 45345

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/C5H10O/c1-3-4-5(2)6/h3-4H2,1-2H3

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = XNLICIUVMPYHGG-UHFFFAOYSA-N

| CASNo_Ref = {{cascite|correct|CAS}}

| CASNo = 107-87-9

| PubChem = 7895

| RTECS = CY1400000

}}

|Section2={{Chembox Properties

| Formula = C₅H₁₀O

| MolarMass = 86.13 g/mol

| Appearance = Colorless liquid

| Odor = resembling acetone

| Density = 0.8062 g/ml (20 °C) {{cite journal |last1=Baird |first1=Zachariah Steven |last2=Uusi-Kyyny |first2=Petri |last3=Pokki |first3=Juha-Pekka |last4=Pedegert |first4=Emilie |last5=Alopaeus |first5=Ville |title=Vapor Pressures, Densities, and PC-SAFT Parameters for 11 Bio-compounds |journal=International Journal of Thermophysics |date=6 Nov 2019 |volume=40 |issue=11 |page=102 |doi=10.1007/s10765-019-2570-9|doi-access=free |bibcode=2019IJT....40..102B }}

| MeltingPtC = -78

| BoilingPtC = 102 NIST Chemistry WebBook. http://webbook.nist.gov

| RefractIndex = 1.3903 (20 °C)

| Viscosity = 0.50 mPa·s (20 °C)

| VaporPressure = 3.6 kPa (20 °C)

| Solubility = 6% (20°C)

| MagSus = −57.41·10⁻⁶ cm³/mol

}}

|Section3={{Chembox Hazards

| MainHazards =

| FlashPtC = 10

| AutoignitionPt =

| PEL = TWA 200 ppm (700 mg/m³){{PGCH|0488}}

| ExploLimits = 1.5–8.2%

| IDLH = 1500 ppm

| LD50 = 1600 mg/kg (rat, oral)
1600 mg/kg (mouse, oral){{IDLH|107879|2-Pentanone}}

| REL = TWA 150 ppm (530 mg/m³)

| LCLo = 50,000 ppm (guinea pig, 50 min)
13,000 ppm (guinea pig, 5 hr)

}}

}}

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.{{citation | author=Dieter Stoye | contribution=Solvents | title=Ullmann's Encyclopedia of Industrial Chemistry | edition=7th | publisher=Wiley | year=2007 | pages=55–56}} It occurs naturally in Nicotiana tabacum (Tobacco){{citation | author=T. C. Tso | contribution=Tobacco | title=Ullmann's Encyclopedia of Industrial Chemistry | edition=7th | publisher=Wiley | year=2007 | page=19}} and blue cheese as a metabolic product of Penicillium mold growth.{{cite web|url=http://www.webexhibits.org/butter/compounds-methylKetones.html|title=WebExhibits: Methyl ketones}}