Ingredient Guides4 min read
Kojic Acid: Notifying a Brightening Active Within the Rules
Kojic acid's INCI, CAS, stability quirks, and the claim language that keeps a brightening product a cosmetic, not a drug.
May 17, 2026Read
Tagged stability
Ingredient Guides4 min read
Ascorbic Acid (Vitamin C): The Stability Problem Filers Face
L-ascorbic acid's INCI name, CAS number, and why its oxidation sensitivity pushes many formulators toward derivative forms instead.
April 28, 2026Read
Business & Operations4 min read
Why Adding Water Raises Your Testing Bill
How introducing water into an anhydrous formula changes preservation needs and brings challenge testing and stability work into the picture.
April 25, 2026Read
Labeling & Claims4 min read
The Period After Opening Symbol on Cosmetic Labels
That little open jar with 12M inside it isn't decoration. Here's what it actually means and when your product needs one.
April 4, 2026Read
Prohibited & Restricted4 min read
Kojic Acid on the Hotlist: Limit and Conditions
Kojic acid is restricted, not banned, on Canada's Hotlist. What the concentration limit means for brightening formulas and how to file around it.
January 23, 2026Read