Methyl nonyl ketone

2-Undecanone

Names
IUPAC name Undecan-2-one
Other names Methyl nonyl ketone (MNK) Nonyl methyl ketone Methyldecananone 2-Hendecanone Undecanone IBI-246
Identifiers
CAS Number	112-12-9 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:17700 Y
ChemSpider	7871 Y
DrugBank	DB08688 Y
ECHA InfoCard	100.003.579
KEGG	C01875 Y
RTECS number	YQ2820000
UNII	YV5DSO8CY9 Y
InChI InChI=1S/C11H22O/c1-3-4-5-6-7-8-9-10-11(2)12/h3-10H2,1-2H3 Y Key: KYWIYKKSMDLRDC-UHFFFAOYSA-N Y InChI=1/C11H22O/c1-3-4-5-6-7-8-9-10-11(2)12/h3-10H2,1-2H3 Key: KYWIYKKSMDLRDC-UHFFFAOYAV
SMILES O=C(CCCCCCCCC)C
Properties
Chemical formula	C11H22O
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)
Solubility in water	0.00179 g/100 mL (25 °C)
Hazards
Safety data sheet	External MSDS
EU classification (DSD) (outdated)	Flammable (F) Irritant (Xi)
R-phrases (outdated)	R50 R51
S-phrases (outdated)	S23 S24 S25
NFPA 704	2 1
Flash point	88 °C (190 °F; 361 K)
Related compounds
Related Ketones	Acetone Butan-2-one 3-pentanone
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y  (what is YN ?)
Infobox references

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.

Research from North Carolina State University has shown that it may be useful as a mosquito repellent, as effective as, or even more effective than, DEET.

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.