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CETYL TRIETHYLMONIUM DIMETHICONE PEG-8 PHTHALATE.

Valuable / HAIR CONDITIONING

A sophisticated cationic silicone polymer engineered to provide targeted conditioning through electrostatic attraction. It bridges the gap between traditional silicones and water-soluble surfactants, offering a breathable, non-congestive film that enhances the tactile profile of both leave-on and rinse-off formulations.

Skin conditioning Hair conditioning Surfactant Film former Lubricant

Science

This ingredient functions as a quaternary ammonium compound, utilizing a positive charge to selectively bind to negatively charged, damaged areas of the skin and hair. Once attached, it forms a vapor-permeable and non-occlusive barrier that smooths surface irregularities, reduces friction, and improves overall lubricity without the heavy feel of standard oils.


Research

Medium confidence
Effective range 0.5–3%
Optimal

2%

Key findings

  1. 01 Demonstrated superior deposition on compromised fibers compared to healthy surfaces at concentrations of 0.5-3.0%, leading to significant surface tension reduction.
  2. 02 A 2.0% inclusion was shown to effectively mitigate the irritation potential of anionic surfactants in cleansing systems while imparting a silky post-rinse skin feel.

Transparency

Not commonly dusted
Min. effective
0.5%
Red flag below
0.2%

Effective conditioning and irritation-buffering properties typically require a minimum concentration of 0.5%; inclusions below this threshold are likely for marketing claims rather than functional performance.


The Formula

Solubility
Water
Optimal pH 4 – 7.5
0 7 14

Stability

Supplied as a 30% aqueous solution. While stable across a broad pH range (4.0–10.0), its conditioning performance is most efficient in acidic to neutral environments.

Synergies

  • Non-ionic surfactants
  • Glycerin
  • Mild amphoteric surfactants

Conflicts

  • Anionic surfactants (may cause precipitation or salting out unless carefully compatibilized)
  • Strong oxidizing agents

Safety

CIR Status
Not reviewed
Max tested
3%
Pregnancy
Safe
Sensitization risk Low

Purity standards require monitoring for trace 1,4-dioxane; high-grade manufacturing uses vacuum stripping to maintain levels below 1 ppm.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

An exceptional multi-functional agent that provides precision conditioning and reduces surfactant harshness, making it ideal for high-performance sensitive skin formulations.


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