2-戊酮

{{Chembox
| Watchedfields = changed
| verifiedrevid = 477215208
| NameEn = 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
| IUPACName = 2-pentanone
| OtherNames = 甲基丙基酮
MPK
|Section1=
|Section2={{Chembox Properties
| Formula = C5H10O
| MolarMass = 86.13
| Appearance = 无色液体
| Odor = 酮类气味
| Density = 0.809 g/ml
| MeltingPtC = -78
| BoilingPtC = 102
| RefractIndex = 1.390 (20 °C)
| Viscosity = 0.50 mPa·s (20 °C)
| VaporPressure = 3.6 kPa (20 °C)
| Solubility = 6% (20°C)
| ExploLimits = 1.5%-8.2%
| REL = TWA 150 ppm（530 mg/m3）在自然界中，它存在于烟草中，也在蓝奶酪中作为青霉菌生长的代谢产物存在。

制备
2-戊酮可以以乙醇为原料在250~500℃、0.1~8.0MPa条件下制备。
参考文献
参见
五个碳原子的酮：

• 甲基异丙基酮
• 3-戊酮

其它同分异构体：

• 戊醛