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PPG-8 GLYCERYL ETHER.

Valuable CAS 25791-96-2

PPG-8 Glyceryl Ether is a hydrophilic polyether compound engineered as a versatile skincare ingredient. It primarily functions as an effective humectant and skin-conditioning agent, while also improving formula aesthetics as a solubilizer and emulsifier.

Summary

humectant skin conditioning emulsifier solubilizer surfactant

Science

Mechanism of Action

This ingredient actively functions as a humectant, drawing and retaining moisture from the surrounding environment into the skin, thereby enhancing hydration and maintaining softness and suppleness. It simultaneously acts as a skin conditioning and emollient agent, helping to restore skin's natural moisture, improve lubrication, and increase flexibility by forming a delicate protective layer. Its surfactant and emulsifying properties enable it to solubilize oil-based ingredients into water-based systems and stabilize emulsion formulas.

Research

Clinical Evidence

Low confidence
Effective range 1–10%
Optimal

N/A

Key findings

  1. 01 For a related ingredient (PEG/PPG/Polybutylene Glycol-8/5/3 Glycerin), a usage rate of 1-10% is recommended. This related compound demonstrated efficacy as a moisturizing humectant, solubilizer, and skin-conditioning agent, imparting a non-sticky, silky skin feel and enhancing the delivery of active ingredients.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 3 – 10
0 7 14

Stability

PPG-8 Glyceryl Ether exhibits excellent stability across a wide pH range of 3 to 10. It is heat stable up to 80°C, though for optimal preservation of sensitive active ingredients, it is ideally incorporated into formulations below 60°C. The ingredient also maintains good stability at low temperatures, down to -20°C, and dissolves readily in cold water.

Synergies

  • Moisturizers and emollients (enhances hydration)
  • Active ingredients (improves delivery in water-based systems)

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The CIR Expert Panel has assessed the broader category of 131 alkyl PEG/PPG ethers, concluding they are safe for use in current cosmetic practices and concentrations when formulated to be non-irritating. While a specific maximum concentration for PPG-8 Glyceryl Ether was not provided, related PPG Stearyl Ethers were supported for use at concentrations up to 25%. This ingredient is also listed by the FDA in the Inventory of Food Contact Substances for specific, limited food applications.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PPG-8 Glyceryl Ether is a valuable, multi-functional ingredient providing robust hydration, superior skin conditioning, and excellent formulation versatility, supported by a strong safety profile suitable for all skin types.

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