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Cosmetic ingredient dictionary

Oxyquinoline Sulfate in cosmetics: what it is and what it does

Oxyquinoline Sulfate is a cosmetic ingredient that slows the growth of microbes on the skin. The EU allows it only with limits or conditions. Open Beauty Facts finds it in 9 products, most often hair care.

By Bravoora teamUpdated Sources checked 3 sourcesHow we check

What does Oxyquinoline Sulfate do in a product?

In a cosmetic product, Oxyquinoline Sulfate slows the growth of microbes on the skin and keeps an emulsion from separating. The EU’s CosIng database lists these jobs for it: antimicrobial and emulsion stabilising.

antimicrobialemulsion stabilising

What other names and numbers does Oxyquinoline Sulfate have?

CAS number
134-31-6
EC number
205-137-1
CosIng reference
35775

Is Oxyquinoline Sulfate restricted in the EU?

Yes, it has limits. The EU allows it only with limits or conditions of use, such as a maximum amount or a warning on the label (Annex III of Regulation 1223/2009, entry 51).

The annex entry sets the exact limits, the products it may be used in and any warning the label must carry.

Which products contain Oxyquinoline Sulfate?

Open Beauty Facts finds Oxyquinoline Sulfate in the ingredient lists of 9 of the 22,021 products it has a list for, most often hair care, hair dyes and permanent hair dyes.

  • Hair care3
  • Hair dyes3
  • Permanent hair dyes1

Products with it, by country of sale: France 3 · Canada 3 · Spain 1 · Turkey 1.

Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Oxyquinoline Sulfate turns up, not how much of the market it is.

On these listsRestricted in the EU

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’.

  1. European Commission: CosIng cosmetic ingredient database (functions, description, EU annex entry)
  2. Open Beauty Facts: product database, 77,506 products, read 13 October 2026, ODbL
  3. EU Regulation 1223/2009 on cosmetic products (the annexes)

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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