How to read an essential oil label in Europe

Last updated: 12 September 2026

Two bottles of lavender oil can sit side by side and carry completely different labels. One has a red-bordered diamond and a warning that it may be fatal if swallowed. The other has an ingredient list and a little open-jar symbol. Neither is mislabelled. They are being sold under different laws.

Two bottles, two different laws

What determines the label is not what is in the bottle. It is what the bottle is presented as.

Sold as an essential oil — a raw material, an aromatic substance — and it is a substance or mixture. The relevant law is the CLP Regulation, Regulation (EC) No 1272/2008, which is about classifying and communicating hazards. That gets you pictograms, signal words and H-codes.

Sold as something to put on your body — a roll-on, a face oil, a body blend — and it is a cosmetic product. The relevant law is the Cosmetics Regulation, Regulation (EC) No 1223/2009. That gets you an INCI-style ingredient list, a batch number and a durability date.

A product can even fall under both regimes in different respects. This is why comparing two labels and concluding that one company is hiding something is usually a mistake. You may be comparing a raw material to a finished cosmetic.

The hazard label, and what those codes mean

Essential oils are chemically busy substances, and under CLP most of them classify for something. The classifications that turn up most often:

• Flammable liquid, Category 3 — the oil and its vapour can catch fire. This is why a bottle next to a lit candle is a worse idea than it looks.
• Skin irritation, Category 2 — can irritate skin on contact.
• Skin sensitisation, Category 1 — can cause an allergic reaction, and repeated exposure makes that more likely rather than less. Sensitisation is not something you get used to; it is something you acquire.
• Aspiration toxicity, Category 1 — carries the statement may be fatal if swallowed and enters airways.
• Hazardous to the aquatic environment, chronic Category 2 — which is a real argument against rinsing leftovers down the sink.

Sweet orange oil is a good ordinary example: it typically classifies for skin sensitisation and for long-term aquatic toxicity. Nothing exotic, just citrus peel.

H304 is the one to understand

Of all the codes, this is the one worth knowing by heart, because it is the one people misread.

H304: may be fatal if swallowed and enters airways.

Read it carefully. The danger being described is not poisoning by digestion. It is aspiration — the oil going into the lungs instead of the stomach. Thin, oily liquids do this easily, and once in the lung tissue they cause a chemical pneumonia that is genuinely dangerous.

This has one immediate practical consequence. If someone swallows essential oil, do not try to make them vomit. Vomiting is exactly the moment when a thin oil gets into the airway. Call a poison centre or a doctor and take the bottle with you.

It also explains why a child-resistant closure on a small bottle is not fussiness.

The cosmetic label: seven things it must carry

If the product is placed on the market as a cosmetic, Article 19(1) of the Cosmetics Regulation lists what must appear. In plain terms:

1. The responsible person — a name and an address inside the EU, plus the country of origin for imported products. Somebody legally answerable, reachable at a real address.
2. The nominal content — weight or volume at the time of packaging.
3. The date of minimum durability — the date until which the product will still do what it is meant to do, if stored properly. Products lasting over 30 months may instead show a period-after-opening symbol, the little open jar with a number of months.
4. Precautions for use — including any required by the annexes.
5. The batch number, or a reference identifying the product. This is the thread that connects your bottle to a production record. It is what makes a recall possible.
6. The function of the product, unless it is obvious from presentation.
7. The list of ingredients, headed by the word ingredients, in descending order of weight, with nanomaterials marked.

That last one is where the fragrance allergens live — the run of names like linalool and limonene at the end of the list. From 31 July 2026 that run gets longer, because the EU added 56 substances to the list that must be named. That change has its own page.

What “100% pure” does and does not tell you

“100% pure” is not a defined legal category. It is a marketing phrase, and it can be perfectly honest — but on its own it tells you almost nothing useful.

It does not tell you the species. Lavandula angustifolia and Lavandula hybrida are both lavender and both can be pure. They are different oils with different compositions.

It does not tell you where it was grown, when it was distilled, or how it has been stored. It does not tell you whether the batch was tested, or against what.

The things that are defined, and that you can therefore check, are the boring ones: the botanical name, the batch number, the date, the responsible person, the hazard statements. A label that gives you those is telling you more than one that shouts about purity.

Why the date on the bottle is about safety, not just quality

Here is the detail that changed how I store citrus oils.

Limonene — the main component of citrus peel oils — oxidises. And the products of that oxidation are more sensitising than the limonene itself. So a badly stored bottle of orange oil is not merely a weaker smell. It is a bottle that has become more likely to cause a skin reaction than it was when you bought it.

Which means warm light and a half-empty bottle with air in it are not just aesthetic problems. Cool, dark, tightly closed, and finished within a reasonable time is a safety practice, not a purist ritual.

A short checklist

Before buying, look for:

• The botanical name, not only the common one
• A batch number and a date
• A responsible person with a real address
• Hazard information that is present rather than absent — its absence is a flag, not a comfort
• A child-resistant closure on anything with an aspiration hazard

Common questions

My bottle has no hazard pictogram. Is it fake?

Not necessarily. If it is placed on the market as a cosmetic rather than as a substance, the cosmetic labelling rules apply instead, and pictograms are not part of them. Check whether it is presented as a cosmetic before assuming anything is wrong.

Does “therapeutic grade” mean anything?

Not in European law. There is no legal grade of that name. It is a brand phrase, and every brand that uses one has defined it itself.

Why does the same oil have a different label in the UK?

The UK has run its own cosmetics and chemicals regimes since leaving the EU. They started from the same text and can drift. I have not verified the current UK detail and will not guess at it.

Can I just read the ingredient list and work out the allergens myself?

Partly. The declared allergens are listed for you above the relevant threshold. What you cannot read off the label is the exact concentration of each, since the list is by order of weight rather than by figure.

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The oils mentioned on this page

• Lavender
• Peppermint
• Lemon

Each product page lists the botanical name, the size, the directions and the cautions, with a buy button for your country.

Read next

• The EU allergen list just tripled: what changes in 2026
• Essential oils and cats: the enzyme your cat does not have
• Can you cook with essential oils?