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DIMETHICONE PEG-7 PHOSPHATE.

Valuable CAS 132207-31-9 / CLEANSING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

DIMETHICONE PEG-7 PHOSPHATE is a polyethylene glycol-modified silicone polymer, recognized for its multifunctional role as a cleansing agent, emulsifier, and surfactant in skincare formulations. Its water-dispersible nature allows for effective rinsing without residue buildup.

Summary

Cleansing Emulsifying Surfactant

Science

Mechanism of Action

This ingredient functions by reducing surface tension, enabling even product distribution as a surfactant. As an emulsifier, it stabilizes oil and water mixtures, crucial for consistent product texture. Additionally, it aids in maintaining a clean skin surface through its cleansing properties. Related dimethicone compounds contribute to temporary skin barrier formation, mitigating transepidermal water loss, while also smoothing skin texture by minimally filling fine lines and pores, and offering protection against external irritants.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5.5 – 8.5
0 7 14

Stability

DIMETHICONE PEG-7 PHOSPHATE is a water-dispersible silicone, easily washable without causing buildup. PEG-modified silicones inherently achieve water solubility. Optimal stability for formulations, based on a related ingredient (PEG-8 Dimethicone), occurs within a pH range of 5.5 to 8.5. Hydrolysis occurs slowly outside this range; for instance, 20% hydrolysis took 45 days at pH 5 and 86 days at pH 8.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Dimethicone PEG-7 Phosphate is safe at its current usage levels and concentrations. A broader CIR safety assessment in 2003 on dimethicone and related polymers noted their large molecular weight makes significant skin absorption unlikely. Although this assessment was reopened in 2019 and an amended report drafted in 2021 due to increased usage frequency, the 'safe as used' conclusion remains. Specific maximum use concentrations for Dimethicone PEG-7 Phosphate were not provided in readily available CIR summaries, though dimethicone itself has reported safe use up to 85% for dermal contact.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

A versatile water-dispersible silicone functioning as a cleanser, emulsifier, and surfactant, widely considered safe for all skin types and beneficial for formulation stability.

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