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BEHENTRIMONIUM CHLORIDE.

Valuable CAS 17301-53-0 / ANTISTATIC, HAIR CONDITIONING, PRESERVATIVE

A sophisticated cationic quaternary ammonium salt used primarily as a conditioning agent and emulsion stabilizer. It provides a distinctively smooth, velvety skin feel by forming a lightweight protective film that enhances moisture retention.

Antistatic agent Conditioning agent Emulsion stabilizer Preservative booster

Science

As a cationic surfactant, it carries a positive charge that is electrostatically attracted to the negatively charged proteins on the skin and hair surface. This attraction allows it to anchor to the stratum corneum, creating a smoothing conditioning layer that reduces friction, neutralizes static, and improves the skin's tactile softness.


Research

High confidence
Effective range 1–5%
Optimal

3%

Key findings

  1. 01 A human repeat insult patch test (HRIPT) confirmed that concentrations of 2.4% are non-sensitizing to the skin.
  2. 02 Safety assessments by the CIR found no evidence of irritation at 5.0% in both rinse-off and leave-on applications.
  3. 03 Clinical evaluations of body lotions containing 1-5% concentration demonstrated no dermal irritation even in subjects with compromised skin barriers.

Transparency

Not commonly dusted
Min. effective
0.5%
Red flag below
0.1%

While it can be used at 0.1% as a preservative, its primary functional benefits for skin texture and conditioning typically require concentrations above 1.0%.


The Formula

Solubility
Oil
Optimal pH 6 – 8
0 7 14

Stability

A waxy solid with a high melting point of approximately 90°C; it requires heating in the oil phase. It is stable within a pH range of 5.0 to 8.0 and acts as an effective co-emulsifier.

Synergies

  • Fatty alcohols (Cetyl/Stearyl)
  • Non-ionic surfactants

Conflicts

  • Anionic surfactants (e.g., Sodium Lauryl Sulfate)
  • Strong oxidizing agents
  • High electrolyte or salt concentrations

Safety

CIR Status
Safe as used
Max tested
5%
Pregnancy
Safe
Sensitization risk Low

In the EU, concentration is restricted to 3.0% for leave-on facial products and 5.0% for rinse-off hair products.


Your Skin

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

Our Assessment

Valuable

An excellent conditioning agent for enhancing the sensory profile and moisture-retention capabilities of high-performance emulsions.


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