INCI Names vs Common Names on Your Ingredient List

Somebody hands you a jar of shea butter and asks what's in it, and you'd say "shea butter," obviously. Put that same jar on a regulatory filing and the answer needs to be "Butyrospermum Parkii Butter." Neither answer is wrong, they're just doing different jobs, and mixing them up on the parts of your business where it matters is one of the more common small errors makers make.

What INCI actually is

INCI stands for International Nomenclature of Cosmetic Ingredients, and it's the standardized naming system used specifically so that an ingredient means the same thing on a label in Canada as it does on a label anywhere else using the same system. It's why something as universally simple as water shows up as "Aqua" on every ingredient list you've ever squinted at. That's not decorative Latin, it's the actual required name.

INCI names are precise in a way common names often aren't. "Vitamin E" could mean several different tocopherol forms with different properties. "Tocopherol" or "Tocopheryl Acetate" as INCI names tell you specifically which one you're dealing with. That precision is exactly why the system exists: a common name can be marketing-friendly and technically vague at the same time, and a regulatory filing has no room for vague.

Why INCI is mandatory on your filing and label

Health Canada's Cosmetic Notification Form and your Canadian product label both require ingredients to be listed by their INCI name, with a concentration or a concentration range attached. This isn't a stylistic preference, it's how the whole system stays checkable. When Health Canada, or any regulator running an INCI-based system, checks your formula against a prohibited or restricted substances list, they're matching against INCI names and CAS numbers, not against whatever a supplier decided to call their proprietary blend.

Trade names never appear on a filing. If your supplier sells you "SilkGlow Complex" or "HydraSeal 4000," those names mean nothing to a regulator and nothing to a screening system. Your job, or your notification tool's job, is to map that trade name back to its actual INCI components before anything gets filed.

When a common name is allowed to appear at all

Here's where the nuance actually lives. A trivial or common name can sometimes appear on a label alongside the INCI name, generally in situations where the common name adds genuinely useful consumer information the INCI name doesn't convey on its own, most often with botanical ingredients where consumers recognize "chamomile" more readily than they'd recognize the Latin binomial buried inside an INCI name. But this is additive, not a substitute. The INCI name still has to be there and has to be correct; the common name is a supplementary courtesy to the reader, not a replacement mechanism.

Situation	What belongs on the ingredient list
Standard filing and label requirement	INCI name plus concentration or range
Supplier's trade name for a blend	Never appears; must be mapped to component INCI names
Common name for consumer clarity	Can sometimes appear alongside the INCI name, not instead of it
Botanical extract with no assigned CAS number	Still requires its correct INCI name even without a CAS number

Where this trips people up in practice

A few patterns show up constantly:

• Copying an ingredient list straight from a supplier's marketing page, which is written in trade names and common names for consumer appeal, not INCI names for regulatory accuracy.
• Assuming a "natural" or trendy botanical ingredient's common name is close enough to its INCI name to skip verifying the actual nomenclature.
• Forgetting that a supplier blend expands into multiple INCI entries, one per component, rather than a single line item.

The practical habit worth building

Every ingredient that touches your formula, whether it arrived as a raw material or buried inside somebody else's proprietary blend, needs its correct INCI name identified before it goes anywhere near a filing. That's tedious to do manually across a full ingredient deck, especially when suppliers change formulations of their blends without renaming them.

This is precisely the mapping step Cosmetic Comply automates: it takes your product's ingredient list, matches every entry to its correct INCI name and CAS number, expands supplier blends into their real components with percentages carried through, and screens the result before a human reviewer signs off and the notification gets filed.