How we scored it
Where it comes from
Polyquaternium-9 is a homopolymer of petrochemical dimethylaminoethyl methacrylate, quaternised with bromomethane. There is no natural-feedstock alternative in commercial production.
In plain English
A conditioning polymer that helps hair feel smooth and reduces static. It is built entirely from lab-made acrylate building blocks and has no plant or mineral origin.
CosIng definition: 2-Propenoic acid, 2-methyl-, 2-(dimethylamino)ethyl ester, homopolymer, quaternary ammonium reaction products with bromomethane
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References
- 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
- 2POLYQUATERNIUM-9. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3POLYQUATERNIUM-9. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=POLYQUATERNIUM-9