Verifying an INCI Name Against the Official Dictionary

A supplier spec sheet listed an ingredient as "Rosemary Extract Oleoresin" and left it at that. Sounds specific enough to use as-is, right? Except that's not how the phrase reads once you go looking for it as a standardized name, and that gap between "sounds like a real ingredient name" and "is actually a recognized INCI entry" is exactly where filing problems start.

What the INCI system is actually for

INCI, the International Nomenclature of Cosmetic Ingredients, exists so that a given substance has one standardized name that means the same thing everywhere, regardless of which supplier sold it to you or which country you're filing in. Water is always Aqua. A given plant extract has a defined INCI name tied to the specific plant part and extraction method. The whole point is that a regulator reading your ingredient list doesn't need to guess what a name refers to, because the name itself is standardized.

That only works if the name you write down is actually the standardized one. Supplier documentation doesn't always cooperate. Marketing departments write descriptive names, older paperwork uses names that predate an update, and sometimes a name is just typed wrong and nobody's caught it because it still sounds plausible.

Why "sounds right" isn't the same as "is correct"

This is the trap. A name like "Rosemary Extract Oleoresin" reads as a perfectly reasonable description of a rosemary-derived ingredient. But descriptive plausibility isn't verification. The actual INCI entry for that kind of material might use different terminology entirely, tied to the specific plant part, or it might be that the supplier is describing a processing method rather than giving you the INCI name at all. Until you've checked the name against the real dictionary, you don't actually know whether what's on your batch sheet will map cleanly to a filing, or whether you're one supplier-shorthand step removed from something usable.

Trade names are the more obvious version of this same problem. Nobody expects a trade name to appear on a filing. But descriptive or semi-standardized names sit in a trickier middle ground, close enough to sound legitimate, not necessarily close enough to actually be correct.

A practical verification routine

1. Start from the supplier's technical data sheet or safety data sheet, not the marketing sheet. Section 3 of a safety data sheet lists composition, and that's a better source for the actual substance identity than a product page.
2. Check the name against the official INCI dictionary directly. If it's not there as written, that's your signal to dig further rather than assume the name is close enough.
3. Ask the supplier directly for the INCI name if the documentation doesn't clearly state one. This is a completely normal, common request, and a supplier who can't answer it is a flag worth noting on its own.
4. Cross-check against a CAS number where one exists. A matching CAS number gives you a second, independent way to confirm you've got the right substance, since the CAS registry and the INCI dictionary are different systems that should agree on identity even though they're not the same list.
5. Remember that some botanical extracts genuinely don't have a CAS number. That's not a red flag by itself, some natural complex materials don't get assigned one, but it means the INCI name itself is carrying more of the identification weight, so get that name right.
6. Watch for names that have been updated over time. The INCI dictionary is maintained and can change, so a name that was correct on an old formulation record might not be the current standardized version.

Where this actually saves you trouble

Getting the INCI name right at the ingredient-list stage is much cheaper than discovering the problem after a filing. A misidentified ingredient can mean you screened the wrong substance against a restriction list entirely, effectively skipping the check you thought you'd done. It can also mean an amendment later, once someone (a regulator, a retailer, your own future self) notices the name doesn't match anything real.

A quick reference for common trouble spots

Trouble spot	Why it's tricky	What to do
Descriptive supplier names	Sound plausible, aren't standardized	Check the actual dictionary, don't assume
Trade names	Clearly not INCI, but sometimes used carelessly	Always map to the real INCI name first
Botanical extracts with no CAS number	Feels like missing data, isn't necessarily wrong	Confirm via the INCI name itself and supplier documentation
Blend components	Buried inside a single trade name	Get the full component breakdown from the supplier
Older or superseded names	Correct once, may not be current	Recheck against the current dictionary, not memory

Cosmetic Comply runs exactly this kind of verification as part of preparing a Canadian filing, matching every ingredient you provide to its actual INCI name and CAS number and flagging anything that doesn't map cleanly, so a plausible-sounding supplier description doesn't quietly become the thing your notification gets built on.