Cosmetic ingredient dictionary
Polyurethane-33 in cosmetics: what it is and what it does
Polyurethane-33 is a cosmetic ingredient that holds a powder or a pressed product together. Open Beauty Facts finds it in 8 products, most often nail makeup.
By Bravoora teamUpdated Sources checked 2 sourcesHow we check
What does Polyurethane-33 do in a product?
In a cosmetic product, Polyurethane-33 holds a powder or a pressed product together. The EU’s CosIng database lists this job for it: binding.
What is Polyurethane-33?
Polyurethane-33 is a complex polymer formed by reacting dimethylolpropionic acid and a polyester composed of Adipic Acid, Hexylene Glycol, Neopentyl Glycol with methylene dicyclohexyldiisocyanate (SMDI) to form a prepolymer. The prepolymer is neutralized with triethylamine and then chain-extended with hydrazine.
- CosIng reference
- 85977
Which products contain Polyurethane-33?
Open Beauty Facts finds Polyurethane-33 in the ingredient lists of 8 of the 22,021 products it has a list for, most often nail makeup and nail polishes.
Products with it, by country of sale: Australia 6 · Germany 6 · France 2.
Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Polyurethane-33 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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