Canada's fragrance allergen disclosure, and the 2026 dates that change it

Fragrance used to be a single word you could hide a whole formula behind. On an ingredient list, "Parfum" or "Fragrance" covered dozens of aroma chemicals without naming any of them. That is changing in Canada, and if you sell anything scented, the change lands on both your Cosmetic Notification Form and your label.

The short version: Health Canada is requiring certain fragrance allergens to be disclosed by name, and it is rolling the requirement out in two waves with two different dates. Getting ahead of it now is a lot cheaper than reprinting labels later.

Why fragrance allergens get special treatment

A fragrance allergen is an aroma compound known to cause allergic skin reactions in a meaningful number of people. Things like Limonene, Linalool, Citronellol, Geraniol, Eugenol, Coumarin. Many of them occur naturally in essential oils, so "all natural" does not mean "allergen free." Lavender oil carries Linalool. Citrus oils carry Limonene. Rose and geranium carry Citronellol and Geraniol.

Because these compounds are common and their reactions are well documented, regulators want them named on the label above a certain concentration, so a person with a known sensitivity can actually avoid them. Burying them inside "Parfum" defeats that.

List 1 and List 2

Health Canada's approach splits the allergens into two sets that become mandatory on different dates.

List 1 is the original group, the set of fragrance allergens that has been the reference point for years. Disclosure of these on the CNF and the label becomes mandatory on April 12, 2026.

List 2 is the expanded set, a larger group of allergens aligned with the broader list regulators have moved toward internationally. Disclosure of these becomes mandatory on August 1, 2026.

So there is a window in 2026 where List 1 already binds you and List 2 is about to. If you are formulating or relabeling this year, the sensible plan is to prepare for the full expanded set now rather than update twice in a few months.

The concentration triggers

Disclosure is not required at any trace amount. It kicks in above concentration thresholds, and the threshold is different depending on whether the product stays on the skin or gets rinsed off.

The common reference points are 0.001 percent (10 parts per million) for leave on products and 0.01 percent (100 parts per million) for rinse off products. Above those levels for a listed allergen, the allergen gets named. Below them, it generally does not. Because leave on products sit against skin far longer, their trigger is ten times lower, which is why a body lotion discloses allergens a rinse off body wash at the same fragrance level might not.

This is where the percentages you worked out for your ingredient list pay off again. To know whether Linalool crosses 0.001 percent in your leave on serum, you need to know how much Linalool your fragrance or essential oil actually contributes, which comes from the fragrance supplier's allergen declaration.

What to ask your fragrance supplier

Every fragrance house and reputable essential oil supplier can give you an allergen declaration, sometimes called an IFRA allergen statement or a certificate that lists the allergen content of the oil. Ask for it. It tells you, for that specific oil or fragrance, the percentage of each listed allergen it contains.

From there the math is the same as any other blend. Multiply the allergen percentage in the fragrance by the fragrance's use level in your formula, and you get the allergen's concentration in the finished product. Compare that against the leave on or rinse off trigger and you know whether it has to be named.

What this means for your filing

Three practical moves:

• Collect allergen declarations for every scented raw material you use, not just the ones labeled fragrance.
• Calculate each listed allergen's concentration in the finished product using its real contribution, not a guess.
• Plan for List 2 now so you are labeling to the expanded set before August 1, 2026, and not reprinting in the fall.

This is exactly the kind of check that rewards precision and punishes a confident guess. An allergen that should be disclosed and is not is a labeling problem, and one disclosed that did not need to be just clutters the label. Cosmetic Comply runs your fragrance and essential oil inputs against the allergen lists, does the leave on versus rinse off math for you, and flags what needs to appear on the label, with a reviewer checking the result before you commit it to a print run.

Scented products are where compliance gets detailed. The dates are set, the lists are known, and the work is mostly arithmetic done carefully. Do it once, do it now, and the 2026 deadlines stop being a scramble.