Snapshot
- Overview
- A preservative that keeps products fresh but can irritate some skin.
- Category
- Preservative
- Type
- Preservative
Benzalkonium Chloride
Benzalkonium chloride is a quaternary ammonium compound that functions as a cationic surfactant and preservative. It controls microbial growth in water-based products and extends shelf life, but it can irritate some users.
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Our take
Is Benzalkonium Chloride a Good Ingredient?
It's an effective preservative with broad antimicrobial action, but it carries a meaningful irritation risk, especially on sensitive or compromised skin, and that risk keeps the rating at Fair. The irritation potential limits how desirable it is in leave-on products despite its usefulness.
What it does
Skin Benefits
Helps maintain product freshness by limiting microbial spoilage, though it may be irritating for some, especially on sensitive or compromised skin.
Where you'll find it
Uses in Skincare & Cosmetics
Employed in sprays, lotions, and cleansers as a preservative that supports shelf stability.
Before you use it
Safety
Can cause stinging, dryness, or irritation, particularly on sensitive skin and mucosal or compromised areas. Lower concentrations and rinse-off formats tend to be better tolerated; discontinue use if irritation persists.
Products with Benzalkonium Chloride
