Cosmetic ingredient dictionary
Silicone Quaternium-18 in cosmetics: what it is and what it does
Silicone Quaternium-18 is a cosmetic ingredient that softens and smooths the skin. Open Beauty Facts finds it in 6 products, most often permanent hair dyes.
By Bravoora teamUpdated Sources checked 2 sourcesHow we check
What does Silicone Quaternium-18 do in a product?
In a cosmetic product, Silicone Quaternium-18 softens and smooths the skin, and makes hair easier to comb, softer or shinier. The EU’s CosIng database lists these jobs for it: emollient and hair conditioning.
What other names and numbers does Silicone Quaternium-18 have?
- CosIng reference
- 58525
Which products contain Silicone Quaternium-18?
Open Beauty Facts finds Silicone Quaternium-18 in the ingredient lists of 6 of the 22,021 products it has a list for, most often permanent hair dyes.
Products with it, by country of sale: Turkey 3 · Spain 1 · Norway 1 · Germany 1.
Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Silicone Quaternium-18 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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