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Skeletal formula of (+)-citronellal
Ball-and-stick model of the (+)-citronellal molecule
Ball-and-stick model of the (-)-citronellal molecule
IUPAC name
106-23-0 YesY
ChEBI CHEBI:47856 YesY
ChEMBL ChEMBL447944 YesY
ChemSpider 7506 YesY
EC number 203-376-6
Jmol-3D images Image
KEGG C17384 YesY
PubChem 7794
Molar mass 154.25 g/mol
Density 0.855 g/cm3
Boiling point 201 to 207 °C (394 to 405 °F; 474 to 480 K)
Related compounds
Related alkenals


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

Citronellal or rhodinal or 3,7-dimethyloct-6-en-1-al (C10H18O) is a monoterpenoid, the main component in the mixture of terpenoid chemical compounds that give citronella oil its distinctive lemon scent.

Citronellal is a major isolate in distilled oils from the plants Cymbopogon,[2] lemon-scented gum, and lemon-scented teatree. The (–)-(S)-enantiomer of citronellal makes up up to 80% of the leaf oil from kaffir lime leaves and is the compound responsible for its characteristic aroma.

Citronellal has insect repellent properties, and research shows high repellent effectiveness against mosquitoes.[3] Research shows that citronellal has strong antifungal qualities.[4]

Compendial status[edit]

See also[edit]


  1. ^ Citronellal, The Merck Index, 12th Edition
  2. ^ Mahalwal, Vijender S.; Ali, Mohd. (2003). "Volatile constituents ofCymbopogon nardus (Linn.) Rendle". Flavour and Fragrance Journal 18: 73. doi:10.1002/ffj.1144. 
  3. ^ Jeong-Kyu KIM, Chang-Soo KANG, Jong-Kwon LEE, Young-Ran KIM, Hye-Yun HAN, Hwa Kyung YUN (2005). "Evaluation of Repellency Effect of Two Natural Aroma Mosquito Repellent Compounds, Citronella and Citronellal". Entomological Research 35 (2): 117–120. doi:10.1111/j.1748-5967.2005.tb00146.x. 
  4. ^ Kazuhiko NAKAHARA, Najeeb S. ALZOREKY1, Tadashi YOSHIHASHI, Huong T. T. NGUYEN and Gassinee TRAKOONTIVAKORN (2003). "Chemical Composition and Antifungal Activity of Essential Oil from Cymbopogon nardus (Citronella Grass)". JARQ 37 (4). 
  5. ^ The British Pharmacopoeia Secretariat (2009). "Index, BP 2009" (PDF). Retrieved 31 March 2010.