How concentration-triggered restriction works, where an everyday ingredient is fine at low use rates but crosses into restricted territory past a threshold.
How a master formula record locks in your exact recipe, batch math, and process so every future batch of your best seller comes out identical.
The skin around the eye absorbs differently and tolerates less. Here is how that changes what belongs in an eye cream formula.
Emulsifying wax NF and Polawax are blends of several INCI substances, and your filing needs every one of them listed separately.
The two-step multiplication that converts a fragrance oil's use rate and its allergen fraction into the real allergen concentration in your finished product.
A side-by-side look at Sodium Laureth Sulfate and Sodium Lauryl Sulfate on mildness, foam, INCI, CAS, and dioxane concerns.
Propylene glycol's INCI name, CAS 57-55-6, and how to pick its primary function when multiple roles apply on your notification.
A quick-reference table of common carrier oils and their exact Latin-binomial INCI names, built for filing and label accuracy.
Preservatives riding in on hydrosols and plant extracts still count toward your limit, here is how to trace them.
How to respect an overall essential-oil dermal ceiling and per-oil sensitizer limits in the same formula at once.
Why a waterless whipped body butter has different preservative logic than a lotion, and how to describe that accurately on a CNF.
Who actually owns the recipe and who holds notification duty differs between private label and bespoke formulation, and it changes your entire filing workload.
How to track two separate acid concentration limits at once when a product carries both an AHA and a BHA.
How to list a pre-diluted active on your CNF without dropping the carrier water or double-counting the active percentage.
The exact math for converting parts per million to percent, with worked examples for fragrance allergen thresholds and preservative limits.
Breaks down how to declare emulsifiers, water phase, and oil phase ingredients correctly for a rich hand cream on a Canadian notification.
Potassium sorbate (CAS 24634-61-5) only works below a certain pH. Here's the chemistry, the pairing options, and where it falls short alone.
How to work out the real concentration of actives and preservatives already inside a ready-made lotion or cream base before you add anything.
How butylene glycol and propylene glycol differ on feel and solubilizing power, with the INCI and CAS details a filing actually needs.
The rule for when a supplier blend can stay one INCI line versus when Health Canada's CNF needs its components broken out.
The case for running a Cosmetic Ingredient Hotlist screen first, before packaging, labels, or CNF paperwork, since it can force reformulation.
Why a pinch of citric acid to correct pH is a completely different regulatory conversation than an AHA exfoliation claim.
How to get the full INCI list from a base supplier and file it correctly without guessing at hidden components.
Why the same INCI name can carry two CAS numbers, and which one belongs in your filing when hydrate, anhydrous, or salt forms differ.