Cosmetic ingredient dictionary
Octylisothiazolinone in cosmetics: what it is and what it does
Octylisothiazolinone is a cosmetic ingredient that slows the growth of microbes on the skin. Open Beauty Facts finds it in 17 products, most often soaps.
By Bravoora teamUpdated Sources checked 2 sourcesHow we check
What does Octylisothiazolinone do in a product?
In a cosmetic product, Octylisothiazolinone slows the growth of microbes on the skin. The EU’s CosIng database lists this job for it: antimicrobial.
What other names and numbers does Octylisothiazolinone have?
- CAS number
- 26530-20-1
- EC number
- 247-761-7
- CosIng reference
- 57621
Which products contain Octylisothiazolinone?
Open Beauty Facts finds Octylisothiazolinone in the ingredient lists of 17 of the 22,021 products it has a list for, most often soaps.
Products with it, by country of sale: France 14 · Germany 2 · Austria 1.
Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Octylisothiazolinone 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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