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BIS-CETYL CETYL DIMETHICONE.

Valuable CAS - / SKIN CONDITIONING - EMOLLIENT

A high-performance, alkyl-modified silicone that bridges the gap between traditional emollients and protective barriers. It provides a sophisticated, velvet-like texture while stabilizing complex lipid-based formulas, making it ideal for precision skincare and sun protection.

Emollient Film-former Skin conditioning agent Pigment dispersant

Science

By integrating long-chain cetyl (C16) groups into the silicone backbone, this ingredient creates a breathable, non-occlusive film on the skin's surface. This structure significantly reduces transepidermal water loss (TEWL) and improves the uniform distribution of active lipids and UV filters without a greasy residue.


Research

High confidence
Effective range 0.1–5%
Optimal

3%

Key findings

  1. 01 Demonstrated 0.25% - 3.0% efficacy in stabilizing lipophilic UV filters and heat-sensitive cooling agents up to 100°C.
  2. 02 Shown to significantly enhance hair fiber luster and manageability when used at 0.1% - 5.0% in synergistic lipophilic blends.

Transparency

Not commonly dusted
Min. effective
0.25%
Red flag below
0.1%

While it functions as a sensory enhancer at very low levels, its primary clinical benefits for formula stabilization and barrier protection require concentrations of 0.25% or higher.


The Formula

Solubility
Oil
Optimal pH 3 – 10
0 7 14

Stability

Exhibits exceptional thermal stability and maintains integrity across a broad pH spectrum. Highly resistant to degradation in anhydrous systems.

Synergies

  • Avobenzone
  • Lipophilic UV filters
  • Lipid-rich emollients
  • Cooling agents

Conflicts

  • High concentrations of anionic surfactants
  • Purely aqueous systems

Safety

CIR Status
Safe as used
Max tested
5%
Pregnancy
Safe
Sensitization risk Low

Large molecular weight prevents skin penetration, ensuring safety for the dermal barrier. Categorized as non-irritating by the CIR.


Your Skin

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

Our Assessment

Valuable

An essential stabilizer and texture-refining agent that ensures active ingredients remain evenly distributed and stable under environmental stress.


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References