Turn a scented candle over and you will often find a small block of warning text. It may name an ingredient you have never heard of. Then comes a line saying it may produce an allergic reaction. That can look alarming on something bought to make the house smell nice. In fact, it shows the maker has followed UK rules on labelling candle scent oil. Here is what those words mean.
Why Candle Scent Oil Needs a Label
The wax is not the reason. The Health and Safety Executive for Northern Ireland explains that wax itself is not hazardous. The rules look at the fragrance and colour added to it.
A candle counts as a "mixture" under CLP, the law on classifying, labelling and packaging chemicals. Some fragrance ingredients are sensitisers. That means they can set off an allergic reaction in some people, even at low levels.
Great Britain's Health and Safety Executive says suppliers must use warning symbols and written warnings where they find hazards.
What does "may produce an allergic reaction" mean?
It is a note for people who already know they react to a named ingredient. It helps them spot it and choose a different scent. HSENI says it applies once a sensitiser goes above 0.1% of the candle, or less for a few strong ones.
Fragrance Oils for Candles: Reading the Warning Box
There are two levels of label. The difference is how much sensitiser is in the mix.
- Over 0.1%: the ingredient is named, with a warning line.
- Over 1% in total: an exclamation mark symbol appears.
- Also over 1%: the word "Warning" and a skin reaction line.
HSENI adds that the more fragrance a candle holds, the more likely it needs a warning. So a well-scented candle with a warning box is common.
Who Checks Candles and Fragrances?
Labels are one layer. The other comes from the fragrance industry itself. The International Fragrance Association (IFRA) sends fragrance materials for review by RIFM, a research body that gathers safety data. An independent expert panel then checks whether current use levels are safe for consumers.
If they are not, IFRA issues a Standard that limits how makers use the material. Members get a set time to comply. This is an industry system, not a law.
The tealights in our Advent Calendar carry an 8% fragrance load, meaning how much scent oil is in the wax. So if you know you react to an ingredient, check the box first.
Quick answers
Do scented candles need warning labels?
Many do. Under CLP, a candle needs warning text when a sensitising fragrance ingredient goes above set levels. The more fragrance in the wax, the more likely it needs a label.
What is IFRA?
IFRA is the International Fragrance Association. It sets industry Standards that limit or ban fragrance materials, based on safety data from RIFM and a review by an independent expert panel.
A warning box is nothing to fear. It is information, in a standard layout, so you can compare one candle with the next. Read it, then light it. If 12 Christmas scents sounds like your kind of December, the Glow Advent Calendar has two of each.
Related reading
- Fragrance in Candles: Does More Oil Really Mean More Scent?: what fragrance load really changes in the jar.
- Soy vs Paraffin Candles: What the Research Actually Says: the wax side of the story.
- Candle Perfume Notes Explained: Top, Heart and Base: how a scent is built, note by note.
