2-Nonanon - 2-Nonanon

Structural formula
Structural formula of 2-nonanone
Name 2-Nonanon
other names
  • Nonan-2-one
  • Methylheptylketon
Sum formula C9H18O
Brief description

colorless liquid with an aromatic odor [1]

External identifiers / databases
CAS number 821-55-6
EC number 212-480-0
ECHA-InfoCard 100.011.345
PubChem 13187
Wikidata Q15726063
Molar mass 142.24 g · mol −1
Physical state

liquid [1]


0,83 g·cm−3[1]

Melting point

−9 °C[1]

boiling point

195 °C[1]


very poorly soluble in water (0.167 g · l −1 at 25 ° C) [1]

Refractive index

1,421 (20 °C)[2]

safety instructions
GHS hazard labeling [1]
no GHS pictograms
H and P phrases H: no H-phrases
P: no P-phrases [1]
Toxicological data
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

2-Nonanone is a chemical compound from the group of dialkyl ketones .


2-Nonanone is found naturally in blue cheese, butter, cabbage [3] , cheddar cheese, coconuts, fish, krill, and others. [2]

Extraction and presentation

2-Nonanone can be obtained by dry distillation of barium caprylate with barium acetate or oxidation of methylheptylcarbinol at room temperature with chromic acid . [4]


2-Nonanone is a slightly volatile, hardly flammable, colorless liquid with an aromatic odor that is very sparingly soluble in water. [1]


2-Nonanone is used as a flavoring, e.g. for lavender fragrances and cheese. [5] It is also used as an intermediate in the chemical industry and as a solvent. [6]

safety instructions

The vapors of 2-nonanone can form an explosive mixture with air ( flash point 69 ° C, ignition temperature 240 ° C). [1]

Individual evidence

  1. a b c d e f g h i j k l Entry for CAS no. 821-55-6 in the GESTIS substance database of the IFA , accessed on November 14, 2017(JavaScript required) .
  2. a b Data sheet 2-Nonanone, ≥99%, FCC, FG from Sigma-Aldrich , accessed on May 4, 2015 ( PDF ).
  3. Ernst Schrott, Hermann Philipp Theodor Ammon: Medicinal plants of Ayurvedic and Western medicine: a comparison . Springer-Verlag, 2012, ISBN 978-3-642-13125-7 , pp. 298 ( limited preview in Google Book search).
  4. George A. Burdock: Encyclopedia of Food and Color Additives:. CRC Press, 1997, ISBN 978-0-8493-9412-6, S. 1976 ( limited preview in Google Book Search).
  5. Technical Data Sheet Methyl Heptyl Ketone FCC. Bedoukian Research, abgerufen am 5. März 2017 (englisch).
  6. chemicalland21.com: 2-NONANONE (METHYL HEPTYL KETONE), abgerufen am 4. Mai 2015