Cosmetic ingredient dictionary
Maleic Acid in cosmetics: what it is and what it does
Maleic Acid is a cosmetic ingredient that keeps the product's acidity steady. Open Beauty Facts finds it in 10 products, most often sunscreen.
By Bravoora teamUpdated Sources checked 2 sourcesHow we check
What does Maleic Acid do in a product?
In a cosmetic product, Maleic Acid keeps the product's acidity steady. The EU’s CosIng database lists this job for it: buffering.
What other names and numbers does Maleic Acid have?
- CAS number
- 110-16-7
- EC number
- 203-742-5
- CosIng reference
- 35135
Which products contain Maleic Acid?
Open Beauty Facts finds Maleic Acid in the ingredient lists of 10 of the 22,021 products it has a list for, most often sunscreen, shampoos and anti-dandruff shampoos.
Products with it, by country of sale: Germany 5 · Switzerland 2 · Belgium 1 · Bulgaria 1.
Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Maleic Acid 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
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