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PEG/PPG-35/9 COPOLYMER.

Valuable CAS 9003-11-6 (generic) / SOLVENT

PEG/PPG-35/9 Copolymer is a nonionic polymer engineered to function as a versatile emulsifier, solubilizer, and wetting agent. It is pivotal for stabilizing complex formulations by effectively bridging hydrophilic and hydrophobic components, thereby preventing phase separation and ensuring product homogeneity.

Summary

Emulsifying Agent Solubilizing Agent Wetting Agent Surfactant Stabilizer

Science

Mechanism of Action

This ingredient operates as a polymeric surfactant, primarily at phase boundaries, due to its nonionic polyoxyethylene–polyoxypropylene copolymer structure. The polyoxyethylene (PEG) segment is hydrophilic, while the polyoxypropylene (PPG) segment is hydrophobic. This dual nature allows it to significantly reduce surface tension, influencing steric effects, electrostatic repulsion, and van der Waals forces to create and maintain stable emulsions or solutions.

Research

Clinical Evidence

High confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 Animal toxicity studies indicated that polyethylene-polypropylene glycol, a similar compound, was non-irritating and non-sensitizing when applied to eyes, gums, and skin. Tested concentrations were 5% w/v and 10% w/v.
  2. 02 Clinical studies involving related PEG Stearates, part of the broader PEG Propylene Glycol Esters group, demonstrated neither irritant nor sensitizing effects at concentrations up to 25%.

Transparency

Dusting Analysis

Not commonly dusted

No specific data regarding 'dusting' properties of PEG/PPG-35/9 Copolymer is available in the provided research.

The Formula

Formulation

Solubility
Water
Optimal pH 3 – 7
0 7 14

Stability

The copolymer exhibits stability in formulations across a pH range of 3 to 7, with optimal performance often observed between pH 4 and 6. Oxidative degradation can manifest as discoloration, a decrease in pH, and increased acidity; appropriate storage in sealed containers is recommended to mitigate moisture absorption and oxidation.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that 'PEG Propylene Glycol Derivatives', a category encompassing PEG/PPG-35/9 Copolymer, are safe for cosmetic applications. Importantly, the prior cautionary statement regarding the use of PEG-containing ingredients on damaged skin has been removed. Clinical findings on related compounds support its non-irritant and non-sensitizing profile at concentrations reaching 25%. It is generally regarded as nontoxic.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG/PPG-35/9 Copolymer is a valuable, well-tolerated, and versatile functional ingredient essential for stabilizing complex cosmetic formulations and ensuring consistent product performance across all skin types.

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References

Sources