Hydroxycitronellal is a pale yellow liquid with a sweet floral aroma.
Hydroxycitronellal is a perfume ingredient with a medium strength floral scent, reminiscent of lily and sweet tropical melon. It is found widely as a chief constituent in essential oils including ilang-ilang oil, palmarosa oil, geranium oil, orange flower oil, lemongrass oil, hops oil, and lavender oil (Source).
Citral and Geraniol are two main components of Hydroxycitronellal. Citral is used as a raw material in the synthesis ionone, a perfumery and flavoring component used in the production of retinol. Geraniol is a pheromone of certain species of bees, secreted by the scent glands of worker bees to signal the location of nectar-bearing flowers and the entrances to their hives. Geraniol is often used in insect repellent products.
A study showed that in aftershave, Hydroxycitronellal has caused facial psoriasis and it is a documented irritant, but only above 5% concentration; cosmetics are only approved for use under 1% concentration. There are some studies that show organ toxicity resulting from Hydroxycitronellal, according to Cosmetic Database, but the occurrence was low and only in rats.
None are recorded.
Source: TruthinAging, https://www.truthinaging.com/ingredients/hydroxycitronellal