The ingredient, explained

Benzalkonium Chloride

Benzalkonium Chloride has published research relevant to the stated experimental context.

AntimicrobialAntistaticDeodorantPreservativeSurfactant

Explore connections

Ingredient guide

What it is and what it does

Quaternary ammonium compounds, benzyl-C8-18-alkyldimethyl, chlorides

About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗

Antimicrobial: A technical role associated with controlling microorganisms on skin.
Antistatic: Reduces the build-up of static electrical charge on surfaces.
Deodorant: Helps reduce or mask unwanted body odour.
Preservative: Helps inhibit microbial growth in the cosmetic product.
Surfactant: Changes surface tension to help a product distribute or interact with other materials.

Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗

Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.

A closer look

What the research shows

Human eye treatment study

Preserved drops produced worse ocular staining and foreign-body symptoms after two weeks in postoperative patients.

What this does not tell us

Ophthalmic postoperative exposure with dexamethasone, not a dermal cosmetic trial. The formulations may differ beyond preservative, and results do not quantify a general skin sensitization risk.

Sources for this summary. PubMed 37903818 ↗

Research review checked Oct 1, 2026

Selective exact-identity review of 7 supplied local candidates and the targeted primary-source search recorded below. Bounded review, not a systematic search.