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PEG/PPG-5/2 PROPYLHEPTYL ETHER.

Valuable CAS 166736-08-9 / CLEANSING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A versatile alkyl PEG/PPG ether, this ingredient primarily functions as a multi-tasking surfactant, emulsifier, and skin conditioning agent. Its unique amphiphilic molecular structure allows it to effectively reduce surface tension, rendering it a valuable component in a wide array of precision skincare formulations.

Summary

surfactant emulsifying cleansing skin conditioning solubilizer solvent

Science

Mechanism of Action

PEG/PPG-5/2 Propylheptyl Ether operates as an alkyl PEG/PPG ether, characterized by distinct hydrophobic and hydrophilic molecular ends. This structure enables it to perform as a surfactant, significantly lowering the surface tension of liquids to facilitate cleansing and emulsification processes. The specific PPG units within its structure further refine its surfactant properties. Additionally, it serves as an effective solubilizer and solvent in cosmetic formulations. Due to its larger molecular size when compared to simpler PEG or PPG compounds, it exhibits a reduced likelihood of penetrating the skin and entering systemic circulation.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

There is no available data to suggest this ingredient is commonly associated with dusting concerns.

The Formula

Formulation

Solubility
Both
Optimal pH 5 – 9.5
0 7 14

Stability

This ingredient generally demonstrates stability under normal conditions of storage and use. For related PEG/PPG copolymers, an optimal pH range of 5.0 to 9.5 is preferred for maintaining stability. While a chemically related compound, PEG-7/PPG-2 Propylheptyl Ether, is known to create turbid solutions in water, it shows solubility in organic solvents such as methanol and acetone.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
0.1%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has evaluated PEG/PPG-5/2 Propylheptyl Ether, alongside 130 other alkyl PEG/PPG ethers, concluding their safety in current cosmetic applications and concentrations, provided formulations are non-irritating. Reported maximum usage concentrations for this class of ingredients extend up to 10% in rinse-off products and typically 5% or below in leave-on products. The panel emphasized that its larger molecular size limits skin penetration and subsequent systemic circulation. While some safety data sheets for concentrated industrial cleaning products may indicate serious eye damage potential, this pertains to the highly concentrated form, not necessarily diluted cosmetic formulations.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

PEG/PPG-5/2 Propylheptyl Ether is a valuable and safe ingredient, offering critical surfactant, emulsifying, and skin conditioning properties essential for a wide range of cosmetic formulations.

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