| IUPAC name
| Other names
Methyl nonyl ketone (MNK)
Nonyl methyl ketone
|3D model (Jmol)||Interactive image|
|Molar mass||170.30 g·mol−1|
|Appearance||Colorless or pale yellow liquid|
|Density||0.829 g/cm3, liquid|
|Melting point||15 °C (59 °F; 288 K)|
|Boiling point||231 °C (448 °F; 504 K)|
|0.00179 g/100 mL (25 °C)|
|Safety data sheet||External MSDS|
EU classification (DSD)
| Flammable (F)|
|S-phrases||S23 S24 S25|
|Flash point||88 °C (190 °F; 361 K)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|(what is ?)|
2-Undecanone, also known as methyl nonyl ketone and IBI-246, is an oily organic liquid manufactured synthetically, but which can also be extracted from oil of rue. It is found naturally in bananas, cloves, ginger, guava, strawberries, wild-grown tomatoes, and the perennial Houttuynia cordata.
2-Undecanone is used in the perfumery and flavoring industries, but because of its strong odor it is primarily used as an insect repellent or animal repellent. Typically, 1–2% concentrations of 2-undecanone are found in dog and cat repellents in the form of a liquid, aerosol spray, or gel.
2-Undecanone is a ketone that is soluble in ethanol, benzene, chloroform, and acetone, but its large carbon chain renders it insoluble in water. Like most methyl ketones, 2-undecanone undergoes a haloform reaction when in the presence of a basic solution of hypochlorite. For example, the reaction between 2-undecanone and sodium hypochlorite yields sodium decanoate, chloroform, and sodium hydroxide.
- CH3CO(CH2)8CH3 + 3 NaOCl → CH3(CH2)8COONa + CHCl3 + 2 NaOH
- Liang, Minmin; Qi, M; Zhang, C; Zhou, S; Fu, R; Huang, J; et al. (2005). "Gas chromatography–mass spectrometry analysis of volatile compounds from Houttuynia cordata Thunb after extraction by solid-phase microextraction, flash evaporation and steam distillation". Analytica Chimica Acta. 531 (1): 97–104. doi:10.1016/j.aca.2004.09.082.
- Mosquitoes Repelled By Tomato-Based Substance; Safer, More Effective Than DEET, Science Daily, June 2002
- Stephen J. Toth, Jr. and Wayne G. Buhler (2002). "North Carolina State University Scientist Discovers Mosquito Repellent in Tomatoes". Pesticide Broadcast. 12 (5).
- Lange's Handbook of Chemistry (14th Edition), McGraw-Hill, 1992; Section 1; Table 1.15
- The Condensed Chemical Dictionary (10th Edition), Gesner G. Hawley
- 2-Undecanone from The Good Scents Company
- MSDS for 2-Undecanone