Citronellal

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Citronellal is a widely used ingredient in cosmetics, personal care, and skincare formulations. Depending on its function, it may serve as a moisturizer, preservative, emulsifier, or active ingredient to enhance the overall effectiveness and performance of a product.

Citronellal (Wikipedia)

Citronellal or rhodinal (C₁₀H₁₈O) is a monoterpenoid aldehyde, the main component in the mixture of terpenoid chemical compounds that give citronella oil its distinctive lemon scent.

Citronellal
Names

(+)-Citronellal
(-)-Citronellal
IUPAC name 3,7-dimethyloct-6-enal
Identifiers
CAS Number	106-23-0^Y
3D model (JSmol)	Interactive image Interactive image
Beilstein Reference	1209447 1720789
ChEBI	CHEBI:47856^Y
ChEMBL	ChEMBL447944^Y
ChemSpider	7506^Y
ECHA InfoCard	100.003.070
EC Number	203-376-6
Gmelin Reference	1521962
KEGG	C17384^Y
PubChem CID	7794
UNII	QB99VZZ7GZ^Y
CompTox Dashboard (EPA)	DTXSID3041790
InChI InChI=1S/C10H18O/c1-9(2)5-4-6-10(3)7-8-11/h5,8,10H,4,6-7H2,1-3H3^Y Key: NEHNMFOYXAPHSD-UHFFFAOYSA-N^Y InChI=1/C10H18O/c1-9(2)5-4-6-10(3)7-8-11/h5,8,10H,4,6-7H2,1-3H3 Key: NEHNMFOYXAPHSD-UHFFFAOYAH
SMILES C/C(C)=C/CCC(C)CC=O O=CCC(CC/C=C(/C)C)C
Properties
Chemical formula	C₁₀H₁₈O
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)
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H317, H411
Precautionary statements	P262, P273, P280, P302+P352
Related compounds
Related alkenals	Citral Methacrolein trans-2-Methyl-2-butenal
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references

Citronellal is a main isolate in distilled oils from the plants Cymbopogon (excepting C. citratus, culinary lemongrass), lemon-scented gum, and lemon-scented teatree. The (S)-(−)-enantiomer of citronellal makes up to 80% of the 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. Another research shows that citronellal has strong antifungal qualities.

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