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DI-C12-18 ALKYL DIMONIUM CHLORIDE.

Avoid CAS 68391-05-9 / HAIR CONDITIONING, SKIN CONDITIONING

A quaternary ammonium salt used primarily as a cationic surfactant and conditioning agent to improve surface texture. While it provides a silky finish to hair and skin, its heavy-duty industrial applications and potential for irritation require careful scrutiny in precision skincare.

Skin conditioning Hair conditioning Antistatic agent Surfactant

Science

As a cationic surfactant, this molecule carries a positive charge that allows it to adsorb onto the naturally negative charge of the skin's surface. This process forms a thin, hydrophobic protective film that reduces static and leaves the surface feeling exceptionally soft and smooth.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

This ingredient is generally used for functional texture modification rather than as a bioactive 'hero' ingredient, so 'dusting' to claim efficacy is not a typical concern.


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Being an oil-soluble cationic surfactant, it is often utilized in emulsions to provide a specific skin-feel.

Conflicts

  • Anionic surfactants
  • Anionic thickeners

Safety

CIR Status
Not reviewed
Pregnancy
Caution
Sensitization risk High

Classified by the ECHA as causing severe skin burns and eye damage in concentrated forms. EWG flags it as unacceptable due to potential systemic concerns including mitochondrial disruption and inflammatory responses observed in related quaternary compounds.


Your Skin

No Normal
No Dry
No Oily
No Sensitive
Irritancy High
Comedogenicity Unknown

Our Assessment

Avoid

Due to its high irritancy profile and classification as a severe corrosive in high concentrations, we recommend avoiding this ingredient in precision skincare.


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