Niacinamide: Filing a Vitamin B3 Active on Your Notification

Niacinamide shows up in a huge share of the serums and moisturizers makers bring us, and it's one of the easier actives to file correctly, provided you keep your claims in cosmetic territory and get the concentration documentation right. Here's what actually matters when you're putting it on a notification.

The identity basics

Niacinamide is the INCI name itself, no translation needed the way some botanical or trade-named ingredients require. Its CAS number is 98-92-0. It's also known as nicotinamide or vitamin B3 in consumer-facing marketing, but on your ingredient declaration and notification, "Niacinamide" is the name that belongs there.

Detail	Value
INCI name	Niacinamide
CAS number	98-92-0
Common names	Nicotinamide, Vitamin B3
Typical use level	Commonly seen in the low single digits up to around 10% in leave-on products
Function	Skin conditioning, commonly marketed for tone and texture

Use levels and what to actually document

Niacinamide is used across a fairly wide concentration range depending on the product type and the effect a formulator is going for. Whatever level you land on, document the actual percentage from your batch sheet, not a rounded marketing number. If your formula uses a niacinamide-containing supplier blend rather than the raw ingredient, expand that blend the same way you would any other: multiply the blend's use level by niacinamide's share of the blend to get its real concentration in your finished product.

Where the claims-versus-cosmetic line matters

Niacinamide is a legitimately popular cosmetic active, and cosmetic-appropriate claims (skin conditioning, supporting an even-looking tone, smoothing texture, brightening in the cosmetic sense) are generally fine. Where makers get into trouble is with claims that push into drug territory: treating a diagnosed skin condition, altering skin structure, or promising outcomes that read as therapeutic rather than cosmetic. Anti-acne claims in particular are typically treated as drug claims in a lot of markets, so if you're using niacinamide partly for its reputation around blemish-prone skin, be careful that your label language stays in cosmetic language, "helps skin look clearer and more balanced," rather than anything that reads as a treatment claim for acne as a condition.

This distinction matters because the ingredient itself isn't the issue, plenty of markets have no specific restriction on niacinamide at ordinary cosmetic use levels, the issue is entirely about what you claim it does.

A quick note on formula interactions worth knowing

Niacinamide has a reputation in some formulating circles for potential interactions with certain forms of vitamin C at particular pH combinations, though modern formulation practice and stabilized vitamin C forms have made this less of a practical concern than older forum discussions suggest. If you're combining the two, this is a stability and efficacy question for your formulator to test, not strictly a regulatory filing issue, but it's worth mentioning here because it affects whether your product performs as intended, which ties back to the same shelf-life and stability testing that supports your safety documentation.

Filing it on a Canadian CNF

On your Cosmetic Notification Form, niacinamide gets listed by its INCI name with its concentration or concentration range, same as any other ingredient. Since it doesn't currently carry the kind of Hotlist restriction that some actives do, the filing itself tends to be straightforward. Always verify current Hotlist status before filing, since restricted-ingredient lists are reviewed and can change, and you want your filing to reflect the current rules rather than what was true when you last checked.

Practical steps for your notification

1. Confirm your batch sheet's actual niacinamide percentage, expanding any supplier blend first
2. List it under the INCI name Niacinamide with CAS 98-92-0 for your internal documentation
3. Double check your label claims are worded as cosmetic benefits, not treatment or drug-adjacent language
4. Verify current Hotlist status before submitting, since restrictions can be updated
5. Keep your batch sheet and any stability data on file in case a question comes up later

If you're managing niacinamide alongside a dozen other actives across a full product line, Cosmetic Comply handles this matching and screening step automatically, mapping each ingredient in your formula to its INCI name and CAS number, checking it against the current Hotlist, and having a real compliance reviewer confirm the result before your Canadian notification gets filed.