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Cosmetic ingredient dictionary

Laureth-4 Carboxylic Acid in cosmetics: what it is and what it does

Laureth-4 Carboxylic Acid is a cosmetic ingredient that lets oil and water mix, so the product can wash dirt away. Open Beauty Facts finds it in 5 products, most often face care.

By Bravoora teamUpdated Sources checked 2 sourcesHow we check

What does Laureth-4 Carboxylic Acid do in a product?

In a cosmetic product, Laureth-4 Carboxylic Acid lets oil and water mix, so the product can wash dirt away. The EU’s CosIng database lists this job for it: surfactant.

surfactant

What other names and numbers does Laureth-4 Carboxylic Acid have?

CAS number
27306-90-7
CosIng reference
76954

Which products contain Laureth-4 Carboxylic Acid?

Open Beauty Facts finds Laureth-4 Carboxylic Acid in the ingredient lists of 5 of the 22,021 products it has a list for, most often face care, face lotions and facial creams.

  • Face care3
  • Face lotions1
  • Facial creams1

Products with it, by country of sale: France 3 · Malaysia 1 · Germany 1.

Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Laureth-4 Carboxylic Acid turns up, not how much of the market it is.

On these listsSurfactants and cleansers

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’.

  1. European Commission: CosIng cosmetic ingredient database (functions, description, EU annex entry)
  2. 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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