Silicone Quaternium-9
INCI: SILICONE QUATERNIUM-9
Reviewed by Daisy · Last updated 18 Aug 2026
What Is Silicone Quaternium-9?
Silicone Quaternium-9 (INCI: SILICONE QUATERNIUM-9) is a cosmetic ingredient listed in the EU CosIng inventory. Silicones and siloxanes, dimethyl, 3-hydroxypropylmethyl, ethoxylated, dihydrogen phosphates, esters with N-(2,3-dihydroxypropyl)-3-(coco-acylamino)-N,N-dimethylpropanaminium chloride.
Its declared cosmetic functions are antistatic and hair conditioning.
Source: European Commission CosIng inventory.
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