Rcitronellol

R-citronellol is the R-enantiomer of citronellol, an acyclic monoterpenoid alcohol with the chemical formula C10H18O. Citronellol is chiral and occurs as two enantiomers, R- and S-, which may be present in varying proportions in natural essential oils. R-citronellol is found in several essential oils, including citronella, rose, geranium, and lemongrass, contributing a floral, citrus-rose aroma that is valued in perfumery.

In perfumery and flavor industries, R-citronellol is used as a fragrance ingredient to impart fresh, rosy-green notes. It is also employed as an intermediate in the synthesis of other fragrance compounds and can be supplied as part of a racemate or as an enantiomerically enriched material. The compound is typically stored and handled with standard precautions for fragrance ingredients.

The two enantiomers have similar odor characteristics, with subtle differences that can depend on the overall matrix. Natural sources of citronellol are often enriched in one enantiomer, while commercial isolates may be racemic or enriched to meet formulating needs.

Safety and regulation: Citronellol is a common fragrance ingredient and is listed as a potential skin sensitizer. In cosmetic and personal care products, it is regulated as a fragrance allergen in many jurisdictions, requiring disclosure on labeling when present above applicable thresholds. It can cause irritation in sensitive individuals and should be used with appropriate handling guidance.