Hydroxycitronellal is a synthetic fragrance ingredient derived from naturally occurring citronellal. It is commonly used in fragrances, hair care products, and skincare products. While it can provide a pleasant scent, it has been associated with potential concerns such as allergies, immunotoxicity, and use restrictions. It is identified as a skin-sensitizing fragrance and can cause skin irritation and allergic reactions.
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Hydroxycitronellal has been associated with potential concerns such as allergies, immunotoxicity, and use restrictions. It is classified as a frequent and well-recognized allergen and can cause serious eye irritation and allergic skin reactions. 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.
Hydroxycitronellal is restricted in cosmetics and should only be used within recommended use or concentration limits. The maximum concentration in ready for use preparation is restricted to 1.0 % in the European Union.
Hydroxycitronellal is synthetically produced from naturally occurring scent chemical citronellal. 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. It is also found in white pepper and tea tree.
Hydroxycitronellal is a thoroughly evaluated and commonly used fragrance ingredient. RIFM has completed an official safety assessment for this ingredient and concluded that hydroxycitronellal is a weak skin sensitizer. These findings have been approved by The Expert Panel for Fragrance Safety, an independent expert advisory board, and are awaiting peer-reviewed publication.
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Hydroxycitronellal is designated as safe for general or specific, limited use in food by the FDA. It is commonly found in perfumes, colognes, fragrances, hair products, skin care products, and oral products. It is also used in the hair and body care industries at a maximum concentration of 3.6%.
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