Ingredient Guide
Chlorphenesin
Also known as: Chlorphenesin, 3-(4-Chlorophenoxy)-1,2-propanediol
All skin types
What It Is
A synthetic preservative used in cosmetics to prevent bacterial and fungal growth. Often used alongside phenoxyethanol as part of a combined preservation system.
What It Does
Prevents microbial contamination in water-containing skincare formulas, working synergistically with other preservatives to protect product safety and integrity.
Best For
Preservation — functional ingredient
Benefits
- Effective against both bacteria and fungi
- Synergizes with phenoxyethanol for broad-spectrum preservation
- Allows lower concentrations of other preservatives when used in combination
When to Be Careful
- Can cause sensitization in some individuals at higher concentrations — regulated at ≤0.3% in most markets
Commonly Found In
SerumsTonersWater-based formulas
Products Containing Chlorphenesin
FAQs About Chlorphenesin
Is chlorphenesin safe in skincare?
At regulated concentrations (≤0.3% in the EU), chlorphenesin is approved for use in cosmetics. It is commonly used as part of a combined preservative system with phenoxyethanol.
Why is chlorphenesin in my serum?
It functions as a preservative, protecting the product from bacterial and fungal contamination. It is often paired with phenoxyethanol for a broader-spectrum, lower-concentration preservation approach.