How Changing Your Formula Can Change Your AICIS Category

A maker we spoke with had already worked out which AICIS category her body butter fell into, filed accordingly, and then reformulated six months later to swap in a different preservative at a slightly higher percentage. She assumed the category stayed the same because the product was "basically the same." It wasn't a safe assumption, and it's worth understanding why.

AICIS doesn't categorize your product, it categorizes your ingredients

This is the part that trips people up coming from a notification-style system. Health Canada's CNF process is about your finished product and its ingredient list. AICIS works differently: it's Australia's scheme for industrial chemicals generally, and cosmetic ingredients get assessed as industrial chemicals through an Inventory and a set of introduction categories, rather than through a per-product filing. What determines your obligations is which chemicals you're introducing, in what volume, and whether they're already recognized on the Inventory or something newer and less established.

That means your "category" isn't a property of your finished cream or serum. It's a property of each ingredient you're introducing, assessed individually. Change an ingredient, and you're potentially triggering a fresh categorization question for that specific substance, independent of what the rest of your formula looks like.

Three ways a reformulation can shift things

Swapping to a different ingredient entirely. If your new preservative, active, or specialty ingredient isn't the same substance as before, you're not carrying over whatever category applied to the old one. The new ingredient gets assessed on its own footing: is it already on the Inventory, does it have an established history of use, does it fall into a category that requires more than the lowest-touch pathway.

Increasing the concentration or volume of an existing ingredient. Categories under schemes like this often key off quantity thresholds, not just identity. An ingredient introduced at a small volume in a niche product can sit in a lower-scrutiny tier, while the same ingredient scaled up across a bigger product line or used at meaningfully higher concentration can cross into a tier with more requirements attached. Growth is exactly the kind of change that can quietly move you into stricter territory.

Sourcing the same named ingredient from a different supplier. This one is easy to miss. Two suppliers can both sell you something labeled the same INCI name, but the actual substance identity, purity, or manufacturing process behind it can differ enough to matter for how it's treated. This is less about AICIS category specifically and more a general reminder that "same INCI name" isn't always "same regulatory story," especially for complex or less standardized materials.

What this looks like in practice

Change you made	What to re-check
New active or preservative ingredient	Whether that specific substance is on the Inventory and what category it falls into
Same ingredient, higher percentage	Whether the new concentration or volume crosses a category threshold
Same ingredient, new supplier	Whether the substance identity and any impurity profile actually match what you assessed before
Ingredient dropped from the formula	Not usually a new obligation, but worth noting for your own records

A practical habit for anyone reformulating

Treat every reformulation, even a "minor" one, as a trigger to revisit your AICIS position on whatever changed, not just a note in your product development file. That doesn't mean redoing the whole exercise from scratch every time. It means specifically asking, for each ingredient that's new or changed in concentration: has this substance's categorization already been established, and does the new amount still sit inside whatever threshold applied before.

This is genuinely one of the areas where the details are specific to AICIS's current categories and thresholds, which is guidance worth confirming directly from AICIS or a specialist who tracks that scheme closely, rather than assuming last year's answer still holds. Categories and thresholds are the kind of regulatory detail that can be updated, and a small maker juggling formulation, production, and sales doesn't always have bandwidth to notice when they shift.

Cosmetic Comply's Canadian notification tool already handles the ingredient-level thinking that this kind of question requires, mapping supplier ingredients to their real INCI names and CAS numbers so a formula change gets flagged rather than waved through on the assumption that a familiar-sounding name means nothing changed. Australia is on the roadmap, and that same ingredient-level discipline is exactly what a scheme like AICIS rewards.