How Fragrance Allergens Fit the Canada CNF Notification

People tend to think of allergen disclosure as a labeling issue, something that lives on the back of the bottle. It also lives on the Cosmetic Notification Form itself, and that's the part that catches makers off guard, because it means the allergen list has to be correct before the product ever ships, not patched onto packaging after the fact.

The two dates you actually need to track

Health Canada is phasing this in across two milestones. List 1, the original fragrance allergen set, becomes mandatory on the CNF and on the label on April 12, 2026. List 2, an expanded set aligned with international lists, follows on August 1, 2026. If you're filing or amending a notification in the gap between those two dates, you're working under List 1 obligations while List 2 is still approaching, which means a product that clears fine in March might need another look in August if it contains an ingredient that only appears on List 2.

Where allergens actually land on the form

The CNF already asks you to list every ingredient by INCI name with a concentration or concentration range. Fragrance allergens don't get a separate special section, they get folded into that same ingredient list, which means the fragrance blend you bought from a supplier has to be broken open first. You can't file "Fragrance" or "Parfum" as a single line and call the allergen obligation met. If that fragrance blend contains Limonene, Linalool, or any other allergen from List 1 or List 2 above the disclosure threshold, each one needs its own line with its own concentration.

The thresholds that decide if you list it

Two numbers matter here, and they're not the same for every product type:

• Leave-on products: disclosure triggers above 0.001% (10 ppm)
• Rinse-off products: disclosure triggers above 0.01% (100 ppm)

A lotion and a shampoo containing the exact same fragrance oil at the exact same use rate can land on different sides of that line, because the rinse-off threshold is ten times more permissive. This is why the product category matters as much as the formula when you're deciding what to disclose.

Where allergens hide in a fragrance blend

Ask your fragrance supplier for the allergen declaration on their blend, not just the trade name. A single essential oil can carry several allergens at once:

Common allergen	Naturally occurs in
Limonene	Citrus oils, many blends as an oxidation-prone component
Linalool	Lavender, many floral blends
Citronellol	Rose, geranium oils
Geraniol	Rose, geranium, citronella
Eugenol	Clove, some spice-forward blends
Coumarin	Tonka bean, some vanilla-adjacent blends, synthetic sources too

A "natural lavender fragrance" can easily carry three or four of these at once, at different concentrations, and a supplier's one-line trade name tells you none of it. You need the actual allergen breakdown from the supplier, expanded the same way you'd expand any other blend, multiplying the allergen's percentage in the blend by your use rate of the blend, to get its true concentration in the finished product.

What this means for an existing filing

If you already have a Cosmetic Notification on file for a product that's still on shelves after these dates take effect, that filing doesn't automatically update itself. An amendment is the mechanism for correcting or updating what's on file when the underlying formula information changes, and adding allergen disclosure to a previously filed product is exactly the kind of update an amendment is for. Waiting until a routine reformulation to catch up on this is a reasonable approach for some makers, but it's worth checking the current Health Canada guidance directly for how they expect existing filings to be brought current, since the exact mechanics can be more specific than general practice.

A short checklist before you file

• Get the full allergen declaration from every fragrance and essential oil supplier, not just the blend name
• Expand blend percentages into finished-product concentrations for each allergen
• Check each one against the leave-on or rinse-off threshold, whichever applies to your product
• List every allergen that clears the threshold as its own INCI line on the CNF
• Flag products that are close to List 2's scope so you're not caught flat-footed in August

Cosmetic Comply screens ingredient lists against the current allergen thresholds as part of its regular matching and screening pass, so a fragrance blend gets broken into its actual allergen components before a human reviewer signs off, rather than a maker having to track two separate deadlines and ten separate allergen names by memory.