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Moumoujus

CETRIMONIUM DIMETHICONE PEG-7 PHTHALATE.

Valuable / HAIR CONDITIONING, SKIN CONDITIONING, VISCOSITY CONTROLLING

A sophisticated, water-soluble silicone derivative that functions as a multifunctional skin conditioning agent and emulsifier. It is specifically engineered to bridge the gap between high-performance lubrication and ease of formulation in water-based systems, offering significant soothing and SPF-enhancing properties.

Summary

Skin conditioning SPF booster Counter-irritant Emulsifier Surfactant Viscosity modifier

Science

Mechanism of Action

This anionic silicone phosphate ester utilizes a substantive dimethicone backbone that naturally gravitates toward damaged or negatively charged areas of the keratin surface. Once bound, it forms a microscopic, breathable film that provides lubricity and reduces the mechanical friction that often leads to irritation, while its unique structure helps stabilize emulsions and disperse UV filters more effectively.

Research

Clinical Evidence

High confidence
Effective range 0.5–5%
Optimal

3%

Key findings

  1. 01 Demonstrated potent counter-irritant activity, significantly mitigating the inflammatory response associated with surfactants like SLS and chemical exfoliants like AHAs at concentrations up to 5%.
  2. 02 Proven to optimize UV filter distribution in suncare formulations, effectively boosting SPF values by creating a more uniform film across the skin surface.
  3. 03 Shown to improve surface texture and gloss on keratinous substrates, providing substantive conditioning that survives rinsing.

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
1%
Red flag below
0.5%

Because it functions as an active counter-irritant and SPF booster, concentrations below 1% may provide some sensory benefit but will likely fail to deliver the clinically documented protective and boosting effects found in manufacturer trials.

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 9.5
0 7 14

Stability

Highly stable in aqueous environments; acts as a primary O/W emulsifier. It possesses an inherently acidic profile in its raw state.

Synergies

  • Sodium Lauryl Sulfate (irritation mitigation)
  • Alpha-Hydroxy Acids (soothing)
  • Chemical and Physical UV Filters (SPF boosting/dispersion)

Conflicts

  • Strongly cationic ingredients
  • High concentrations of electrolytes/salts

Safety

Safety Profile

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

Due to its large molecular weight, it is not absorbed into the bloodstream. Formulators should ensure 1,4-dioxane impurities are below 1 ppm.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

An exceptional multi-tasking ingredient for precision skincare, offering unique irritation-reduction and sunscreen-enhancing benefits without the greasiness of traditional silicones.

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References

Sources