Steam-distilled from the flower buds of Syzygium aromaticum. Rich, spicy, sweet and instantly recognisable — the smell of Christmas, of pomanders, and of the dentist's surgery.
That last one is not a coincidence, and it is the most interesting thing about this oil. Clove is 80 to 90 per cent eugenol, and eugenol is a genuine dental material: zinc oxide–eugenol cement has been used for temporary fillings and dressings for well over a century. But a dental preparation is eugenol at a controlled concentration in a controlled matrix. Neat clove oil on a gum is a chemical burn — it causes tissue damage and, in documented cases, necrosis and lasting nerve irritation. Please do not do it, however many times the internet suggests it.
Please read before using it on skin
Eugenol is a phenol and one of the more potent skin sensitisers among common essential oils — meaning that repeated exposure can create an allergy you did not previously have.
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Keep dermal use at or below about half a per cent — roughly 3 drops in 30 ml of carrier oil. Never neat.
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Never in a bath. Oil floats on water and arrives on skin undiluted; phenol oils in bathwater cause real burns.
- Never in the mouth, the nose, the eyes or on any mucous membrane.
- Not on broken, irritated or sensitive skin.
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Patch test at your intended dilution and wait 24 hours, even if you already use other oils happily.
Do not use it in pregnancy or breastfeeding, and do not use it on children. Clove oil is hepatotoxic — there are documented cases of severe liver injury in young children who swallowed small amounts. If you take an anticoagulant or antiplatelet (warfarin, a DOAC, aspirin, clopidogrel), avoid it: eugenol inhibits platelet aggregation and may add to their effect. Also avoid before surgery.
What an essential oil may and may not claim
Clove is commonly sold as "a natural support for the immune system through the changing seasons", as something that will "purify the air" when diffused, and as a blending oil "to help soothe aching joints and tired muscles". None of that appears here. Soothing joints and muscles is a medicinal claim; "supports the immune system" is a health claim with no authorisation and no defined meaning. No health claim is authorised in the EU for any essential oil.
What it is genuinely good for
Scent, and household use, in very small quantities. One drop of clove will carry an entire winter diffuser blend — it is superb with sweet orange, cinnamon, ginger, vanilla and cedarwood. It is also excellent in a homemade surface cleaner.
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Diffusion: one drop, ventilated room, short session. Not around children, pregnant women or pets — cats and birds in particular.
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The pomander is still the best use anyone has found for cloves: an orange, whole cloves, and a drop of the oil to lift it.
- Keep it off unsealed wood and painted surfaces — undiluted essential oil strips finishes.
Safety — the essentials
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Never swallow essential oils without the direct supervision of a qualified health professional. Clove is one where this genuinely matters.
- Keep out of reach of children, in the original bottle with the child-resistant cap.
- In eyes: flush with plain vegetable oil rather than water, and seek advice.
- Accident or swallowing: in Portugal call CIAV on 800 250 250 — free, 24 hours. In an emergency, 112.
Storage: cool, dark, tightly closed, upright. Clove oil darkens and thickens with age and will stain.
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