Cosmetic ingredient dictionary
Potassium Alum in cosmetics: what it is and what it does
Potassium Alum is a cosmetic ingredient that tightens the skin. Open Beauty Facts finds it in 53 products, most often deodorants.
By Bravoora teamUpdated Sources checked 2 sourcesHow we check
What does Potassium Alum do in a product?
In a cosmetic product, Potassium Alum tightens the skin. The EU’s CosIng database lists this job for it: astringent.
What other names and numbers does Potassium Alum have?
- CAS number
- 10043-67-1, 7784-24-9
- EC number
- 233-141-3
- CosIng reference
- 79432
Which products contain Potassium Alum?
Open Beauty Facts finds Potassium Alum in the ingredient lists of 53 of the 22,021 products it has a list for, most often deodorants and roll-on deodorants.
Products with it, by country of sale: France 35 · United States 3 · Turkey 3 · Poland 2.
Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Potassium Alum turns up, not how much of the market it is.
Bravoora reads this ingredient for everyone you shop for: an allergy or intolerance, a vegan or vegetarian diet, a calorie or protein goal, and the labels on supplements and skincare too. Build a profile · For dermatologists, dietitians and doctors
Sources
The job, the description and the EU annex entry are CosIng’s; the fragrance allergens are the EU Annex III names Bravoora’s label checker reads; the product counts are Open Beauty Facts’.
- European Commission: CosIng cosmetic ingredient database (functions, description, EU annex entry)
- Open Beauty Facts: product database, 77,506 products, read 13 October 2026, ODbL
Contains information from Open Beauty Facts, which is made available here under the Open Database License (ODbL). Read the licence · Download this dictionary’s data · How we check
Create a website profile with the things you avoid and the people you check for.
Build my profileSaved to your account. On launch day, sign in to the app with the same email and carry on where you left off.