Cosmetic ingredient dictionary
Potassium Carbonate in cosmetics: what it is and what it does
Potassium Carbonate is a cosmetic ingredient that keeps the product's acidity steady. Open Beauty Facts finds it in 10 products, most often soaps.
By Bravoora teamUpdated Sources checked 2 sourcesHow we check
What does Potassium Carbonate do in a product?
In a cosmetic product, Potassium Carbonate keeps the product's acidity steady. The EU’s CosIng database lists this job for it: buffering.
What other names and numbers does Potassium Carbonate have?
- CAS number
- 584-08-7
- EC number
- 209-529-3
- CosIng reference
- 36941
Which products contain Potassium Carbonate?
Open Beauty Facts finds Potassium Carbonate in the ingredient lists of 10 of the 22,021 products it has a list for, most often soaps, marseille soaps and liquid soaps.
Products with it, by country of sale: France 4 · United States 2 · Australia 2 · Germany 1.
Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Potassium Carbonate 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 profileSave and edit your profile on this website. App transfer is not available yet.