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Moumoujus

PEG-32.

Valuable CAS 25322-68-3 / HUMECTANT, SOLVENT

PEG-32 is a polyethylene glycol derivative functioning primarily as a versatile formulation enhancer, providing hydration, emollience, and improved ingredient solubility and stability within skincare products. It contributes to maintaining skin moisture and supporting the delivery of other beneficial compounds.

Summary

Humectant Emollient Solvent Solubilizer Emulsifier Dispersing Agent Penetration Enhancer Vehicle

Science

Mechanism of Action

As a humectant, PEG-32 attracts and binds water molecules, thereby enhancing skin hydration and forming a protective film that minimizes transepidermal moisture loss. It acts as an emollient to soften and smooth the skin's surface. Within formulations, PEG-32 serves as an effective solvent and solubilizer, improving the dispersion and stability of active or sparingly soluble ingredients. Its emulsifying and dispersing properties help prevent phase separation in complex formulations, and it can facilitate enhanced skin penetration of co-formulated active substances.

Research

Clinical Evidence

Medium confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 Polyethylene glycols (PEGs) generally function as integral vehicles in topical formulations, with PEG-based systems demonstrating efficacy in restoring barrier function for dry skin conditions. These formulations can enhance the delivery of active ingredients, such as in PEG-based salicylic acid peels which proved effective for comedogenic acne with minimal irritation.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5.5 – 7
0 7 14

Stability

PEG-32 exhibits optimal stability and functionality within a pH range of 5.5 to 7.0. It maintains performance in hard water and is not microbiologically sensitive, often negating the need for additional preservatives. It dissolves readily in water and various organic solvents, including methanol, ethanol, ethylene glycol, and propylene glycol.

Synergies

  • Enhances the solubility and dispersion of sparingly soluble active ingredients.
  • Improves the skin penetration of other cosmetic actives.

Conflicts

  • Potential for cross-sensitization when co-formulated with other PEG derivatives such as PEG ethers, fatty acid esters, castor oils, or sorbitans, due to structural similarities.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed the safety of polyethylene glycols, including PEG-32, for cosmetic use. However, a key consideration involves the potential presence of residual impurities like ethylene oxide and 1,4-dioxane, recognized carcinogens. Additionally, PEGs may exhibit enhanced penetration through compromised or damaged skin barriers, advising caution for individuals with sensitive or impaired skin. No specific maximum use concentration for PEG-32 has been established as a restriction, though related PEGylated oils have been deemed safe up to 100% in cosmetics.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
No Sensitive
Irritancy Unknown
Comedogenicity Low

Our Assessment

Verdict

Valuable

PEG-32 is a valuable multi-functional ingredient that enhances product formulation by improving stability and ingredient delivery while providing beneficial humectant and emollient properties for various skin types.

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