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CETYLPYRIDINIUM CHLORIDE.

Valuable CAS 123-03-5 / ANTIMICROBIAL, ANTISTATIC, DEODORANT, HAIR CONDITIONING, ORAL CARE, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A sophisticated quaternary ammonium compound that serves as a high-performance antimicrobial agent. While traditionally favored in oral hygiene, its ability to disrupt bacterial membranes makes it an exceptional precision tool for managing blemish-prone skin and maintaining microbial balance.

antimicrobial preservative antistatic deodorant

Science

As a cationic surfactant, it utilizes electrostatic attraction to bind with the negatively charged membranes of harmful microbes. Its hydrophobic tail then penetrates the lipid bilayer, creating physical gaps that cause the leakage of essential cellular ions, effectively neutralizing the pathogen through lysis.


Research

High confidence
Effective range 0.045–0.4%
Optimal

0.1%

Key findings

  1. 01 Demonstrated significant bactericidal efficacy against P. acnes at concentrations between 0.1% and 0.4% in nanoemulsion delivery systems.
  2. 02 Proven effective in clinical trials for the modulation of microbiota, reducing pathogenic taxa while preserving commensal species at 0.05%.

Transparency

Commonly dusted
Min. effective
0.05%
Red flag below
0.01%

Because it is often used primarily as a preservative at very low levels (below 0.05%), products claiming 'anti-acne' benefits without at least 0.1% concentration may be 'dusting' the ingredient for marketing purposes rather than therapeutic effect.


The Formula

Solubility
Water
Optimal pH 3.5 – 7
0 7 14

Stability

Exhibits peak stability in neutral environments (pH 6.0-7.0); performance degrades significantly in alkaline conditions exceeding pH 9.0. It is heat stable up to 80°C.

Synergies

  • Non-ionic surfactants
  • Glycerin
  • Nanoemulsion delivery systems

Conflicts

  • Anionic surfactants like Sodium Lauryl Sulfate
  • Anionic polymers such as Carbomer or Xanthan Gum
  • Inorganic solids including Zinc Oxide, Titanium Dioxide, and Kaolin

Safety

CIR Status
Safe with restrictions
Max tested
2%
Pregnancy
Safe
Sensitization risk Low

SCCS safety limits are specific: 0.2% for leave-on skin creams and 0.1% for mouthwashes. Irritation potential increases at concentrations nearing the 2.0% threshold.


Your Skin

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

Our Assessment

Valuable

An expertly targeted antimicrobial that is highly effective for acne-prone skin when formulated within the 0.1% to 0.4% range.


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