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BENZALKONIUM CHLORIDE.

Valuable CAS 63449-41-2 / 68391-01-5 / 68424-85-1 / 85409-22-9 / ANTIMICROBIAL, ANTISTATIC, DEODORANT, PRESERVATIVE, SURFACTANT - DISPERSING

A potent quaternary ammonium compound utilized in precision skincare for its dual-action role as a preservative and a targeted antimicrobial agent. It is particularly valued in acne-focused formulations for its ability to destabilize bacterial biofilms without the high irritation potential of traditional peroxides.

Antimicrobial Preservative Biofilm Disrupter Surfactant Deodorant

Science

This cationic surfactant carries a positive charge that allows it to bind to negatively charged microbial cell membranes. This attraction triggers the mechanical disruption of the lipid bilayer, leading to increased membrane permeability and cellular leakage, while simultaneously dismantling the protective biofilms formed by C. acnes.


Research

High confidence
Effective range 0.1–0.1%
Optimal

0.1%

Key findings

  1. 01 A 24-week double-blind study demonstrated that a 0.1% concentration achieved acne lesion reduction comparable to 2.5% Benzoyl Peroxide, while maintaining a superior safety profile regarding redness and skin dehydration.

Transparency

Not commonly dusted
Min. effective
0.1%
Red flag below
0.05%

Because safety and efficacy are both tightly tethered to the 0.1% threshold, concentrations significantly lower (e.g., <0.05%) may serve only as a preservative rather than an active acne-fighting agent.


The Formula

Solubility
Water
Optimal pH 4 – 10
0 7 14

Stability

Exhibits robust stability across varying temperatures and is resistant to autoclaving; however, it is hygroscopic and requires protection from light and metallic contact.

Synergies

  • Non-ionic surfactants
  • Chelating agents

Conflicts

  • Anionic surfactants
  • Soaps
  • Citrates
  • Kaolin
  • Nitrates
  • Proteins
  • Aluminum
  • PVC/Polyurethane packaging

Safety

CIR Status
Safe with restrictions
Max tested
0.1%
Sensitization risk Moderate

Strictly limited to 0.1% in leave-on products to prevent primary skin and ocular irritation. EU regulations require specific warning labels for concentrations used in rinse-off applications.


Your Skin

Yes Normal
No Dry
Yes Oily
No Sensitive
Irritancy Moderate
Comedogenicity Low

Our Assessment

Valuable

A high-precision antimicrobial that offers a gentler alternative to Benzoyl Peroxide for acne management when formulated at exactly 0.1%.


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