List 1 Fragrance Allergens Your Soap Must Declare by April 2026

If you make scented soap and sell it in Canada, mark April 12, 2026 somewhere you'll actually see it. That's when List 1 fragrance allergens stop being optional detail and become mandatory entries on both your Cosmetic Notification Form and your product label.

This catches a lot of soap makers off guard because they think of allergen labeling as a "big brand" problem, something for department store fragrances with fifty synthetic notes. It isn't. If your lavender and rosemary bar has essential oils in it, and it almost certainly does, you likely already have List 1 allergens in your formula. Essential oils are allergen delivery systems as much as they're scent delivery systems, whether the label says "fragrance" or "essential oil blend."

What triggers the disclosure

The rule is concentration-based, not oil-based. It doesn't matter whether the allergen came from a synthetic fragrance compound or from cold-pressed lavender oil, what matters is how much of it ends up in the finished bar. For soap, which is a rinse-off product, the threshold is above 0.01% (100 ppm). That's a notably higher bar than leave-on products face, which sit at above 0.001% (10 ppm), but soap makers who use essential oils at typical usage rates can still cross it without trying.

Common allergens that show up in the essential oils soap makers reach for constantly:

• Linalool: lavender, bergamot, coriander
• Limonene: citrus oils of almost every kind
• Citronellol: rose, geranium, citronella
• Geraniol: geranium, palmarosa, rose
• Eugenol: clove, cinnamon leaf
• Coumarin: tonka bean absolute, some lavender chemotypes

Notice the overlap. A lavender-citrus bar could easily be carrying linalool and limonene both, from two different oils, and you need the combined concentration of each named allergen across every oil that contributes it.

Why April 12 specifically

This is the mandatory date for List 1, the original fragrance allergen set. A second, expanded set, List 2, follows on August 1, 2026, aligned with international allergen lists, so soap makers scaling toward multiple markets should treat this as a two-stage rollout rather than a single deadline to clear and forget.

Before the mandatory date, you may already be able to voluntarily disclose. After it, disclosure above the threshold isn't a nice-to-have, it's expected on the CNF and the label both.

Getting the percentages right for a cold process bar

The tricky part for soap specifically is that your essential oils are usually added at trace, as a small percentage of total batch weight, but the essential oil itself might be 30 to 40% linalool or more. You need the allergen's actual percentage in the finished bar, not in the bottle of essential oil.

Work it like this: if your fragrance load is 3% of the batch, and your lavender oil is roughly 35% linalool by composition (this varies by lavender species and supplier, so check your specific oil's documentation or a reputable reference), the linalool contributes about 1.05% of the finished soap weight. That's well above the 0.01% rinse-off threshold, so it needs to be on both the filing and the label.

Essential oil	Allergen present	Typical share in oil	Contribution at 3% fragrance load
Lavender	Linalool	roughly 25-45%	well above 0.01% threshold
Sweet orange	Limonene	often 90%+	well above 0.01% threshold
Geranium	Geraniol, Citronellol	varies by chemotype	often above threshold

These are illustrative ranges, not fixed values. Actual percentages vary by crop, distillation, and supplier, so lean on your supplier's certificate of analysis rather than a rule of thumb when you're finalizing numbers for a filing.

What to do before spring

Pull your current lineup of scented bars and go oil by oil. For each one, identify which List 1 allergens are present and estimate the finished-bar concentration at your actual usage rate. If several bars share a base fragrance blend, this is faster than it sounds, since you're really only doing the math once per unique oil.

This is one of the areas where Cosmetic Comply's ingredient screening is genuinely useful for small soap makers, since it flags allergen-relevant constituents in your essential oils against the current thresholds and carries the math through automatically rather than leaving you to redo percentage arithmetic bar by bar. Either way, the April date is close enough now that it's worth getting ahead of rather than scrambling in March.