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C26-54 ALKYL TETRADECYL DIMETHICONE.

Valuable CAS - / SKIN CONDITIONING

A high-performance, alkyl-modified silicone that bridges the gap between traditional silicones and organic oils to provide superior skin conditioning. It functions as a sophisticated film-former that creates a protective, breathable shield to maintain skin hydration without a heavy residue.

Skin conditioning Emollient Film former Occlusive

Science

This ingredient works by forming a hydrophobic, occlusive barrier on the stratum corneum, effectively locking in moisture and preventing transepidermal water loss (TEWL). Its unique alkyl modification enhances its lipophilicity, allowing it to integrate seamlessly with organic lipids to improve the spreadability and sensory profile of topical formulations.


Research

High confidence
Effective range 1–15%
Optimal

15%

Key findings

  1. 01 Human clinical repeat insult patch tests (HRIPT) confirm that this polymer is non-sensitizing and non-irritating to the skin.
  2. 02 Safety assessments by the Cosmetic Ingredient Review (2021) indicate the molecule is not dermally absorbed due to its high molecular weight.

Transparency

Not commonly dusted
Min. effective
1%
Red flag below
0.5%

While often used as a texture enhancer at lower levels, therapeutic barrier protection is typically observed at higher concentrations. Formulations using this at negligible levels (below 0.5%) may be utilizing it for marketing claims rather than functional skin conditioning.


The Formula

Solubility
Oil
Optimal pH 3 – 10
0 7 14

Stability

Demonstrates exceptional stability against oxidation and remains chemically inert across a broad pH spectrum. It is ideally suited for anhydrous systems or the oil phase of emulsions.

Synergies

  • Organic oils
  • Mineral UV filters
  • Lipophilic active ingredients

Conflicts

  • Highly polar aqueous systems
  • Water-based gels without secondary emulsifiers

Safety

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

The high molecular weight prevents systemic absorption, making it an excellent safety profile for all demographics when formulated to be non-irritating.


Your Skin

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

Our Assessment

Valuable

A highly stable and safe barrier-enhancing agent that offers the protective benefits of occlusives with a refined, non-greasy finish.


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