Cold-pressed from the peel of Citrus sinensis. Sweet, juicy and immediately recognisable — the most universally liked smell in any shop, and one of the cheapest oils on the shelf because the peel is a by-product of the juice industry.
The good news on phototoxicity
Most cold-pressed citrus peel oils are phototoxic — they contain furocoumarins that react with UV light and can burn or permanently stain skin. Sweet orange is one of the exceptions. Expressed sweet orange oil is not considered phototoxic, which makes it the easy citrus for skin blends and body oils.
Two things worth knowing all the same. Bitter orange expressed oil, from a different species, is phototoxic — the two are not interchangeable. And sweet orange is still an essential oil: dilute it, patch test it, and do not use it neat.
What is actually in it
Around 95 per cent d-limonene — an unusually simple oil. That single fact explains most of its behaviour: why it smells so exactly of the fruit, why it is such an effective degreaser, and why it goes off faster than almost anything else on this shelf.
What an essential oil may and may not claim
Citrus oils are commonly sold on the promise that the aroma "chases away a low mood", eases "nervous tension", "supports the body's natural defences", or "revives a dull, tired complexion". Claims about mood, about the immune system and about treating skin are health claims, and none is authorised in the EU for any essential oil — so none of them appears here.
What is true and quite sufficient: it smells like an orange, everybody likes it, and a house that smells of oranges is a nicer house.
How to use it
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Diffusion: a few drops in a ventilated room, twenty to thirty minutes at a time. It blends with everything — cinnamon and clove for winter, lavender and cedarwood for evening, peppermint and rosemary for a working morning.
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On skin: one to two per cent in a carrier oil (6–12 drops in 30 ml). Patch test and wait 24 hours.
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Household: excellent. Limonene is a real solvent — a few drops in a vinegar-and-water spray cuts grease properly, and it will lift sticky label residue. For the same reason, keep it off unsealed wood, painted surfaces and plastics.
- Not around babies, young children, pregnant women or pets — cats in particular cannot metabolise these compounds, and limonene-rich oils are among the worst for them.
Storage — the one thing people get wrong
Sweet orange oil has a short life. Limonene oxidises quickly, and oxidised citrus oil is a skin sensitiser where fresh oil is not. Cap tight, cool and dark — the fridge is genuinely the right place — and replace it about a year after opening. If it smells flat, waxy or faintly of turpentine, its skin-safe life is over; use it for cleaning and buy another.
Safety — the essentials
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Never swallow essential oils without the direct supervision of a qualified health professional. This oil is not orange juice.
- 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.
- Accident or swallowing: in Portugal call CIAV on 800 250 250 — free, 24 hours. In an emergency, 112.