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CETEARYL NONANOATE.

Valuable CAS - / SKIN CONDITIONING - EMOLLIENT

A sophisticated synthetic emollient ester designed to mimic the skin's natural lipid structure while providing a luxurious, silicone-like finish. It acts as a lightweight protective agent that enhances the spreadability of pigments and UV filters in advanced cosmetic formulations.

Emollient Skin conditioning Spreading agent Barrier support

Science

This ester functions by infiltrating the interstitial gaps between corneocytes, effectively smoothing the skin's micro-relief. With a melting point optimized for human physiology (30-35°C), it transitions into a fluid upon contact, creating a breathable, hydrophobic film that prevents transepidermal water loss (TEWL) without occlusive heaviness.


Research

High confidence
Effective range 1.5–20%
Optimal

10%

Key findings

  1. 01 A 24-hour Single Insult Occlusive Patch Test at 20% concentration confirmed high skin compatibility.
  2. 02 A provocative Repeat Insult Patch Test on eczema patients using undiluted material (100%) demonstrated zero irritation or sensitization.
  3. 03 Rabbit ear assays at 10% concentration verified the ingredient as non-comedogenic.

Transparency

Not commonly dusted
Min. effective
1.5%
Red flag below
0.5%

While often used for its sensory profile, clinical data supports its safety and efficacy at concentrations as low as 1.5%. Because it is a functional texture enhancer rather than a 'hero' active, it is rarely 'dusted' for marketing claims.


The Formula

Solubility
Oil
Optimal pH 3 – 12
0 7 14

Stability

Demonstrates excellent resistance to thermal fluctuations and oxidation; highly compatible with inorganic UV filters and color pigments.

Synergies

  • Titanium Dioxide
  • Zinc Oxide
  • Lipophilic active ingredients

Conflicts

  • Extreme pH environments (below 3 or above 12) may cause hydrolysis.

Safety

CIR Status
Safe as used
Max tested
10%
Pregnancy
Safe
Sensitization risk Low

The CIR Expert Panel notes it may function as a penetration enhancer, potentially increasing the absorption of co-formulated ingredients.


Your Skin

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

Our Assessment

Valuable

An exceptionally safe and versatile emollient that provides high-performance skin conditioning and superior sensory aesthetics across all skin types.


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