Ingredient guide

Geraniol: A Rose-Scented Declared Fragrance Allergen

Geraniol gives products a sweet, rosy note and is one of the 26 EU-declared fragrance allergens. Here's what it is, who reacts, and where to spot it.

What it is

Geraniol is a naturally occurring scent compound found in rose, geranium, citronella and many other plant oils. It gives products a sweet, rosy, slightly citrus note and is used widely, including in many “natural” ranges because it is plant-derived.

Why it is listed separately

Geraniol is one of the 26 fragrance allergens that UK and EU rules require to be named individually on the label when present above a set level. That is why you will sometimes see it spelled out near the end of an ingredient list even when the product simply says “fragrance” or “parfum” higher up.

Who tends to react

Like other fragrance terpenes, geraniol can oxidise once a product has been open for a while, and the oxidised form is more likely to trigger contact allergy. People with fragrance sensitivity, eczema or a history of contact dermatitis are the most affected. It is also a recognised co-reactor with other rose-note ingredients such as citronellol.

Where it hides

Floral and rose-scented skincare, shampoos, shower gels, botanical ranges, candles and household fragrance. Look for Geraniol on the label, usually toward the end of the ingredient list.

Check products against your list

To check a product, INCI Decoder lets you paste an ingredient list at your desk and explains what each entry, including geraniol, actually is, and a free browser extension like Clearya flags ingredients of concern automatically as you shop online. These describe or rate a product on general criteria rather than against your own list.

Once you know what you are screening for, a personal-list app like ClearaScan lets you save geraniol once and scan any product to flag only your triggers. It also keeps a Reaction Journal for flare-ups, a shared Care Circle so family or carers can scan for you, and a Trusted Products list for items you have cleared, and it is currently in early access. (Disclosure: our editor co-founded ClearaScan, and we are not paid to mention the others.)

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A note on this content. The Sensitive Skin Lab publishes general educational information, not medical advice. If you suspect you have an allergy or sensitivity, consult a qualified dermatologist or allergist. Product formulations and labels change without notice, so always check the ingredients on the product itself.