Polyquaternium-9
A cosmetic ingredient used as antistatic, film forming in skincare, haircare, and personal-care products sold in the European Union.
What is it?
2-Propenoic acid, 2-methyl-, 2-(dimethylamino)ethyl ester, homopolymer, quaternary ammonium reaction products with bromomethane
What does it do?
Polyquaternium-9 is listed in the EU cosmetic ingredient inventory with the following declared functions:
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Antistatic
reduces static electricity, mostly in hair products to keep strands smooth and manageable
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Film forming
forms a thin continuous film on skin, hair, or nails — used in long-wear makeup, sunscreens, and hairsprays
EU regulatory status
Polyquaternium-9 is allowed for use in cosmetic products in the European Union under Regulation 1223/2009. It is not subject to a specific Annex restriction at the time of writing.
Frequently asked questions
What is Polyquaternium-9?
Polyquaternium-9 is a cosmetic ingredient catalogued in the EU CosIng database. 2-Propenoic acid, 2-methyl-, 2-(dimethylamino)ethyl ester, homopolymer, quaternary ammonium reaction products with bromomethane
Is Polyquaternium-9 allowed in cosmetics in the EU?
Yes. Polyquaternium-9 is allowed for use in cosmetic products in the EU under Regulation 1223/2009.
What does Polyquaternium-9 do in cosmetic products?
Polyquaternium-9 is declared in the EU cosmetic ingredient inventory with these functions: antistatic, film forming.
What is the CAS number of Polyquaternium-9?
The CAS (Chemical Abstracts Service) number for Polyquaternium-9 is -.
Related ingredients
Source: EU CosIng database (European Commission). This page is derived from public-sector information published by the European Commission. · Last updated: 15/10/2010