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Moumoujus

STEARDIMONIUM HYDROXYPROPYL PEG-7 DIMETHICONE PHOSPHATE CHLORIDE.

Optional CAS 220714-63-6 / HAIR CONDITIONING, SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

This sophisticated siloxane polymer functions as a multi-tasking conditioning agent for both skin and hair. It expertly forms a protective, breathable film on the skin, contributing to enhanced softness and smoothness while providing effective emollient properties.

Summary

Hair Conditioning Skin Conditioning Emollient

Science

Mechanism of Action

As a modified siloxane polymer integrating polyethylene glycol (PEG) and a quaternary ammonium salt, this ingredient is uniquely structured to engage with both hydrophilic and lipophilic phases. On the skin, it establishes a vapor-permeable film that conditions and softens, visibly smoothing the surface. In hair applications, it lubricates the hair shaft, enhancing manageability, softness, shine, and overall volume.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

This ingredient is a polymeric material typically supplied in liquid form, therefore not associated with dusting concerns.

The Formula

Formulation

Solubility
Both
Optimal pH 5.5 – 8.5
0 7 14

Stability

Possessing both water-soluble and silicone-soluble groups, this PEG/PPG dimethicone polymer exhibits compatibility with both aqueous and oil phases. For optimal stability, formulations should maintain a pH range between 5.5 and 8.5. Outside this window, hydrolysis can occur; for instance, at pH 5, approximately 20% hydrolysis was observed over 45 days, while at pH 8, 20% hydrolysis required 86 days.

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
15%
Sensitization risk Moderate

The CIR Expert Panel deems this class of dimethicone polymers safe in cosmetic uses up to 15% concentration, provided formulations are non-irritating. However, data is insufficient for safe use in products applied via airbrush, where incidental inhalation may occur. Concerns exist regarding potential contamination with toxic impurities like Ethylene Oxide and 1,4-Dioxane, common with PEG-derived components. While generally non-irritating, there is a noted likelihood of irritation, inflammation, or dryness, particularly when co-formulated with other sensitizing ingredients.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Optional

This ingredient offers valuable conditioning and emollient benefits but requires careful formulation within its specified pH and concentration limits to mitigate potential irritation and address general safety concerns regarding PEG-derived impurities.

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