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CETRIMONIUM METHOSULFATE.

Valuable CAS 65060-02-8 / ANTIMICROBIAL, ANTISTATIC, HAIR CONDITIONING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A specialized cationic conditioning agent and surfactant that provides a smooth, frictionless finish to the skin and hair. Beyond its texture-enhancing properties, it acts as a mild antimicrobial and helps stabilize sophisticated oil-in-water emulsions.

Antistatic Conditioning agent Antimicrobial Surfactant Emulsifying agent

Science

Functioning through electrostatic attraction, the positively charged ammonium head group of this molecule binds to the negatively charged keratin surfaces of the skin and hair. This neutralization of static charges effectively smooths the surface texture ('slip') while simultaneously disrupting the negatively charged membranes of harmful microbes.


Research

High confidence
Effective range 0.1–3%
Optimal

0.25%

Key findings

  1. 01 In clinical RIPT testing, 0.25% concentrations were determined to be non-sensitizing, though initial induction phases at higher levels can cause mild irritation.
  2. 02 Clinical models demonstrated increased irritation potential when concentrations exceeded 1.0%, justifying strict regulatory limits for leave-on products.

Transparency

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

Because this ingredient is primarily used for its functional antistatic and conditioning properties at low concentrations, it is rarely 'dusted' for marketing. However, in leave-on facial products, concentrations must remain below 0.1% to 0.25% to ensure safety and prevent irritation.


The Formula

Solubility
Water
Optimal pH 4 – 6.5
0 7 14

Stability

Exhibits excellent stability in acidic to neutral formulations; it is frequently used to improve the deposition of emollients in oil-in-water emulsions.

Synergies

  • Non-ionic surfactants
  • Emollients
  • Cationic conditioning agents

Conflicts

  • Anionic surfactants (forming insoluble complexes)
  • Strong oxidizing agents
  • Soap
  • Strong acids

Safety

CIR Status
Safe as used
Max tested
3%
Pregnancy
Safe
Sensitization risk Low

While safe up to 3% in rinse-off applications, leave-on facial products are restricted to 0.1% (EU) or 0.25% (US) to minimize the risk of skin irritation.


Your Skin

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

Our Assessment

Valuable

An effective precision conditioning agent that excels in neutralizing static and smoothing texture when used within strict safety concentration limits.


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