Where fragrance hides on an ingredient list (and how to spot it)

You’ve decided to avoid fragrance, you flip the bottle over, and you don’t see the word “fragrance” anywhere. Done? Not quite. On a Canadian label, fragrance has several names, and some of them look nothing like fragrance at all. Here’s a tour of where it hides.

Why one word can stand for dozens of chemicals

A scent is almost never a single ingredient. It’s a blend, and blends can be large. The European Union’s scientific committee on consumer safety counted approximately 2,500 fragrance ingredients in the EU’s cosmetic ingredient database. A single perfume formula draws on a selection of these.

Canada’s Cosmetic Regulations let companies skip the details. Section 21.4 says that for fragrance and flavour, the words “parfum” and “aroma” may be inserted at the end of the list of ingredients to indicate that such ingredients have been added to produce or to mask a particular odour or flavour. Health Canada’s guidance explains the reasoning: listing every fragrance component would create impractically long labels.

The US takes the same approach for a different reason. The Food and Drug Administration explains that fragrance formulas are complex mixtures that companies protect as trade secrets, and the law doesn’t force them to disclose those secrets, so the whole mixture can be listed as “fragrance”.

Either way, the result is the same. One word on the label can represent a recipe of dozens of chemicals you can’t see.

Name 1: “parfum”, “fragrance” and “aroma”

“Parfum” is the obvious one, and it usually sits at or near the end of the list. Health Canada’s labelling guide for industry allows “parfum” alone or “parfum” together with “fragrance”, but not “fragrance” by itself, which is why Canadian labels look slightly different from American ones.

What matters is what Health Canada says the word means: if “parfum” or “fragrance” appears in the list of ingredients, the product contains a fragrance or a masking agent. There’s no partial credit. If the word is there, fragrance is there.

“Aroma” is the flavour cousin of “parfum”. Under the same section of the Cosmetic Regulations, it covers the ingredients added to produce or mask a taste in a lip balm, lipstick or toothpaste. It’s another collective word for ingredients the label doesn’t itemize, so if your lips or the skin around your mouth react, “aroma” deserves the same attention as “parfum”.

Name 2: the masking agent in an “unscented” product

Here’s the sneaky one. A product can be labelled “unscented” and still contain fragrance, because a small amount of scent can be added just to cancel the natural smell of the other ingredients. The FDA puts it plainly: even some products labelled “unscented” may contain fragrance ingredients, added in just enough quantity to mask the unpleasant smell of other ingredients without giving the product a noticeable scent.

Health Canada’s guidance is just as clear. It says a product advertised as “fragrance-free” or “unscented” means either that fragrances have not been added or that scents have been hidden by a masking agent. So the front label can’t settle the question. Only the ingredient list can, and the masking agent will be there under “parfum”.

Name 3: essential oils

Essential oils are fragrance in their most concentrated form, and on a label they don’t say so. They appear by botanical name, following the INCI naming system (the International Nomenclature of Cosmetic Ingredients, a standard list of names used worldwide): “Lavandula angustifolia (lavender) oil”, “Citrus limon (lemon) peel oil”, “Melaleuca alternifolia (tea tree) leaf oil”, “Mentha piperita (peppermint) oil”.

They are not gentle by default. DermNet notes that each essential oil can have over 100 constituents and lists tea tree, ylang-ylang, lemongrass, sandalwood, clove, jasmine and narcissus among the oils that commonly cause allergic contact dermatitis, the itchy, red rash that appears when the immune system has learned to react to a substance. Any Latin plant name followed by “oil” is a fragrance ingredient, whether or not “parfum” also appears.

Name 4: plant extracts and “natural fragrance”

Extracts are a greyer area. Some are added for their scent, some for marketing, some for a real skin-care purpose, and they all look the same on a label: “Rosa damascena flower extract”, “Citrus aurantium dulcis (orange) peel extract”, “Chamomilla recutita (matricaria) flower extract”. If the plant is one you recognize by its smell, the extract almost certainly carries that smell, along with the same molecules that make essential oils sensitizing.

The EU committee’s work on natural extracts is a useful warning. It found that oakmoss extract, a classic perfume ingredient, owes its allergenic power to two compounds, atranol and chloroatranol, and that attempts to remove them from the extract have largely failed. Natural complex ingredients are still chemicals, and their allergens come along for the ride.

Name 5: allergens listed by their own names

The newest set of clues is also the most useful. Since April 12, 2026, Health Canada requires 24 specific fragrance allergens to be named individually in the ingredient list when they are present above a threshold: more than 0.001% in leave-on products such as lotions and more than 0.01% in rinse-off products such as cleansers. The list expands to 81 allergens for new products from August 1, 2026, with existing products given until August 1, 2028.

This means you will increasingly see words like limonene, linalool, citral, geraniol, citronellol, eugenol, coumarin or benzyl alcohol listed on their own, often right after “parfum”. Each one is a fragrance chemical known to cause allergy. If you see any of them, the product contains fragrance, even if “parfum” has been left out because the company chose to list fragrance ingredients individually, which Health Canada’s guide also permits. The guide adds a detail that closes a loophole: an allergen must be disclosed even when it arrives as part of a botanical extract.

If patch testing (a diagnostic test where small amounts of suspected allergens are taped to the back for a couple of days) has already told you which chemical your skin reacts to, this is the change that finally lets you find it on a label.

A quick scan you can do in the store

• Start at the end of the list, where “parfum”, “aroma” and colourants usually sit.
• Look for “parfum”, “fragrance” or “aroma”. Any of them means fragrance is present.
• Scan for Latin plant names followed by “oil” or “extract”, especially flowers, herbs and citrus.
• Look for named allergens such as limonene, linalool, citral, geraniol and eugenol.
• Treat “unscented”, “natural fragrance” and “botanical scent” as claims, not evidence. The list decides.

Our fragrance-free products filter applies these same checks, which saves you squinting at small print in the aisle.

If you’ve been avoiding fragrance and still get a rash that comes and goes, one of these hidden names is a likely reason, but so are other ingredients such as preservatives. If it isn’t better after two weeks of truly fragrance-free products, see your doctor or pharmacist, and ask about patch testing if it keeps returning.

The thing to remember is that fragrance rarely announces itself. It hides behind “parfum”, “aroma”, masking agents, botanical names and, increasingly, a short list of allergen names. Learn those words once, and every label in the store becomes readable.