Castoryl Maleate in cosmetics: what it is and what it does

What does Castoryl Maleate do in a product?

In a cosmetic product, Castoryl Maleate keeps the skin in good condition. The EU’s CosIng database lists this job for it: skin conditioning.

What is Castoryl Maleate?

Castoryl Maleate is a modified castor oil in which some of the unsaturation has been converted to a cyclic dicarboxylic acid.

CAS number

241153-84-4

CosIng reference

55124

Which products contain Castoryl Maleate?

Open Beauty Facts finds Castoryl Maleate in the ingredient lists of 8 of the 22,021 products it has a list for, most often bath and shower, shampoos and 2-in-1 shampoos.

• Bath and shower3
• Shampoos1
• 2-in-1 shampoos1

Products with it, by country of sale: France 3 · Australia 3 · Germany 2 · Mexico 1.

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

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