Declaring Essential Oil Allergens on EU Cosmetic Labels

A maker emailed us convinced their lavender-and-orange body oil had "no fragrance, all natural essential oils, nothing synthetic," and was surprised to hear it still needed allergen declarations on the label. That confusion is common and understandable. The word "fragrance" makes people think of synthetic fragrance compounds, but the EU's allergen disclosure rules don't care where a molecule came from. They care what's actually in the bottle, and lavender oil is a cocktail of chemically identical compounds whether it's steam-distilled from a farm or built in a lab.

The allergens don't know they're "natural"

Linalool, limonene, geraniol, citronellol, eugenol, and coumarin are specific chemical compounds. Lavender essential oil is naturally rich in linalool. Citrus oils are loaded with limonene. Clove oil brings eugenol. These aren't additives someone puts into essential oils, they're intrinsic components of the plant's own chemistry, and EU cosmetic labeling regulation requires disclosing them by name when they're present above certain concentration thresholds, regardless of whether the source was a synthetic fragrance compound or a whole, unprocessed essential oil.

This is the single most common surprise for makers moving from a "clean, essential-oil-only" mental model into actual EU compliance work. The regulation is ingredient-composition based, not source based.

Where this actually shows up

Under Regulation (EC) No 1223/2009, allergen disclosure applies once specific fragrance allergens exceed defined concentration thresholds, with different thresholds depending on whether the product is a leave-on (something that stays on skin, like a lotion or perfume oil) or rinse-off (something washed away, like a shampoo or soap). The exact percentage thresholds and the full allergen list are set out in the regulation and its amendments, and they've been broadened over time to cover more compounds, so if you're formulating today, verify the current list and thresholds directly against the regulation or your Responsible Person rather than relying on an older list you found in a forum post.

Practically, when you build a Cosmetic Product Safety Report (CPSR) and Product Information File (PIF) for a formula containing essential oils, your safety assessor needs the full breakdown of what's chemically inside each essential oil you used, not just the essential oil's name. That means:

• Getting a compositional data sheet or specification from your essential oil supplier that lists the known allergen content (percentage of linalool, limonene, etc. within that specific oil).
• Doing the math on how much of each allergen ends up in the finished product based on your use level of the essential oil.
• Declaring any allergen that crosses the threshold by its own name in the ingredient list, in addition to listing the essential oil itself.

A short worked example

Say a body oil uses 2% lavender essential oil, and the supplier's data sheet shows that lavender oil batch is roughly 30% linalool. The finished product's linalool concentration works out to 0.6% of the total formula, which is well above any leave-on disclosure threshold. That means linalool needs its own line in the ingredient list, separate from and in addition to "Lavandula angustifolia oil."

Multiply that across a blend of three or four essential oils and you can end up declaring five or six individual allergens even though the label proudly says "essential oil blend" up top. That's normal, not a sign something went wrong.

Practical steps for makers

1. Get compositional breakdowns from every essential oil supplier, not just an SDS that says "contains linalool" with no percentage.
2. Calculate each allergen's real concentration in the finished product the same way you'd calculate any other ingredient's concentration, factoring in your use level of the oil.
3. Have your safety assessor confirm the current thresholds and allergen list as part of the CPSR, since these lists are periodically updated and a formula that was compliant last year may need a fresh look.
4. Keep the supplier compositional data in your Product Information File so it's on hand if an authority asks where the allergen percentages came from.

Canadian sellers are watching a related shift closer to home too. Health Canada's own fragrance allergen disclosure requirements are phasing in on a similar logic, expanding what must be declared on the Cosmetic Notification Form and label. If you sell into both Canada and the EU, it's worth building one allergen-tracking habit that serves both markets instead of treating them as separate problems.

This kind of ingredient-level math, tracing a natural essential oil down to its individual allergenic components and their real percentages, is exactly the tedious part of a filing that's easy to get wrong by hand. Cosmetic Comply's ingredient matching carries concentrations through from blends and mixtures so the underlying components don't get lost, which is the same principle that makes essential oil allergen tracking manageable instead of a spreadsheet nightmare.