Fragrance

Hydroxycitronellal

INCI: HYDROXYCITRONELLAL

Reviewed by Kate · Last updated 14 Aug 2026

A synthetic fragrance ingredient that adds scent to skincare formulations

Best For Skin Types

All

Usage Frequency

Daily

What Is Hydroxycitronellal?

Hydroxycitronellal is a synthetic fragrance compound used to add scent to cosmetic and skincare products. It is classified as a fragrance ingredient rather than a functional skincare component, meaning its primary role is olfactory rather than therapeutic.

This ingredient appears in roughly 2.7% of skincare formulations. As a fragrance material, it functions to enhance the sensory experience of a product without directly targeting skin concerns.

How It Works

Hydroxycitronellal works as a fragrance by providing odour characteristics to a skincare product. It does not penetrate the skin or alter skin function; instead, it remains largely on the surface, delivering scent during application and use.

Clinical Evidence & References

Regulatory safety assessments have evaluated hydroxycitronellal for potential toxicological effects including genotoxicity, reproductive toxicity, and skin sensitisation. Available data suggest it does not pose these risks at typical cosmetic exposure levels, with exposure estimated to fall below established safety thresholds.

Fragrances in general are the leading cause of allergic contact dermatitis from cosmetics, and individual fragrance materials can trigger reactions in sensitive individuals. The prevalence of fragrance-related sensitivity varies considerably between people.

How to Use

If you have fragrance sensitivity or a history of allergic contact dermatitis, consider performing a patch test before using products containing this ingredient. Fragrance-free or fragrance-reduced skincare may be a better choice if you experience reactions to scented products.

Safety & Precautions

Generally considered safe at cosmetic concentrations based on regulatory assessments. However, fragrances are a recognised cause of allergic contact dermatitis and may trigger sensitivity reactions in some individuals.

Frequently Asked Questions

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