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Skeletal formula of 2-nonenal
Ball-and-stick model of the 2-nonenal molecule
Preferred IUPAC name
3D model (JSmol)
ECHA InfoCard 100.038.720
Molar mass 140.226 g·mol−1
Appearance Colorless liquid
Boiling point 188.00 to 190.00 °C (370.40 to 374.00 °F; 461.15 to 463.15 K) at 760.00 mmHg
Safety data sheet External MSDS
Irritant (XI)
R-phrases (outdated) R38
S-phrases (outdated) S24/25 S37 S45 S28
NFPA 704 (fire diamond)
Flammability code 2: Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur. Flash point between 38 and 93 °C (100 and 200 °F). E.g. diesel fuelHealth code 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no codeNFPA 704 four-colored diamond
Flash point 79 °C (174 °F; 352 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

2-Nonenal is an unsaturated aldehyde. The colorless liquid is an important aroma component of aged beer[1] and buckwheat.[2]

Odor characteristics[edit]

The odor of this substance is perceived as orris, fat and cucumber.[3] Its odor has been associated with human body odor alterations during aging.[4]


  1. ^ Santos, J. R.; Carneiro, J. R.; Guido, L. F.; Almeida, P. J.; Rodrigues, J. A.; Barros, A. A. (2008). "Determination of E-2-nonenal by high-performance liquid chromatography with UV detection - Assay for the evaluation of beer ageing". Journal of Chromatography A. 985 (1–2): 395–402. doi:10.1016/S0021-9673(02)01396-1.
  2. ^ Janeš, D.; Kantar, D.; Kreft, S.; Prosen, H. (2008). "Identification of buckwheat (Fagopyrum esculentum Moench) aroma compounds with GC-MS". Food Chemistry. 112 (1): 120–4. doi:10.1016/j.foodchem.2008.05.048.
  3. ^ "2-nonenal CAS 60784-31-8". Flavornet.
  4. ^ Haze, S.; Gozu, Y.; Nakamura, S.; Kohno, Y.; Sawano, K.; Ohta, H.; Yamazaki, K. (2001). "2-Nonenal Newly Found in Human Body Odor Tends to Increase with Aging". Journal of Investigative Dermatology. 116 (4): 520–4. doi:10.1046/j.0022-202x.2001.01287.x. PMID 11286617.

Further reading[edit]