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BEHENOXY PEG-10 DIMETHICONE.

Valuable CAS 1136947-78-8 / HUMECTANT, VISCOSITY CONTROLLING

A sophisticated, multifunctional silicone wax that bridges the gap between occlusive protection and aesthetic elegance. It provides a breathable yet protective barrier that locks in moisture while ensuring a refined, silky finish in high-performance emulsions.

Emulsifying Humectant Skin conditioning Viscosity controlling Surfactant

Science

This amphiphilic molecule utilizes a long-chain behenyl (C22) group to form a waxy, breathable lattice on the skin's surface, significantly reducing Trans-Epidermal Water Loss (TEWL). Simultaneously, its PEG-10 units provide humectant properties and allow the ingredient to act as a versatile emulsifier (HLB 4-6) for stabilizing complex water-in-oil and water-in-silicone systems.


Research

High confidence
Effective range 1–15%
Optimal

5%

Key findings

  1. 01 Clinical assessments on 39 subjects confirmed that a 40% concentration in aqueous solution is non-irritating.
  2. 02 A large-scale study involving 201 volunteers established no signs of sensitization or irritation for this class of PEG-modified silicones.
  3. 03 Testing of undiluted material (100% concentration) on 50 subjects demonstrated zero instances of skin irritation.

Transparency

Not commonly dusted
Min. effective
1%
Red flag below
0.1%

As a structural and sensory modifier, it is typically used at functional levels (1-15%) rather than 'dusting' levels. Concentrations below 0.5% in emulsions may indicate its use purely for label claims rather than significant textural or barrier benefit.


The Formula

Solubility
Both
Optimal pH 3.5 – 8.5
0 7 14

Stability

Maintains structural integrity in neutral and mildly acidic or alkaline environments. Avoid exposure to strong mineral acids or oxidizing agents which can degrade the siloxane backbone.

Synergies

  • Glycerin
  • Hyaluronic Acid
  • Cyclopentasiloxane
  • Mineral UV filters

Conflicts

  • Strong oxidizing agents
  • Concentrated mineral acids
  • Strong alkalis

Safety

CIR Status
Safe as used
Max tested
15%
Pregnancy
Safe
Sensitization risk Low

The 15% concentration limit is the current industry reference for leave-on products, though the ingredient has shown safety at much higher concentrations in clinical settings.


Your Skin

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

Our Assessment

Valuable

An exceptional texture-enhancing agent that provides reliable barrier support and humectancy with a superior safety profile across all skin types.


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