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Moumoujus

TRIETHOXYCAPRYLYLSILANE.

Valuable CAS 2943-75-1 / BINDING

Triethoxycaprylylsilane is a multifunctional organosilicon compound primarily utilized as a surface modifier for pigments in cosmetic formulations, enhancing their functional performance. It also acts as a skin conditioning agent, helping to maintain moisture and impart a refined skin feel.

Summary

Binder Skin Conditioning Agent Surface Modifier Emulsifier Stabilizer Pigment Coating Agent Dispersing Agent

Science

Mechanism of Action

This ingredient functions by forming strong chemical bonds with and coating inorganic pigments, such as titanium dioxide and zinc oxide, and various colorants. This process renders the pigments hydrophobic, significantly improving their dispersion, spreadability, stability, and water resistance within cosmetic systems. When applied to the skin, Triethoxycaprylylsilane creates a protective film that assists in locking in moisture, reducing transepidermal water loss, and contributing to a smooth, emollient skin surface. In sunscreens, it further contributes to mitigating oxidative stress.

Research

Clinical Evidence

High confidence
Effective range 0.011–2.6%
Optimal

N/A

Key findings

  1. 01 Clinical assessments confirm its safety and efficacy for use in suntan products at concentrations up to 2.6%, optimizing pigment performance.
  2. 02 It is widely employed in diverse cosmetic applications, including eye shadow formulations (up to 2.5%), lipsticks (up to 1%), body and hand sprays (up to 0.021%), and perfumes (up to 0.011%), demonstrating its broad utility.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH ≥4
0 7 14

Stability

Triethoxycaprylylsilane exhibits rapid hydrolysis in the presence of moisture. Its stability is enhanced in acidic conditions, with a half-life of 1.2-1.9 hours at pH 4.0, significantly longer than its 0.3-0.6 hour half-life at pH 7.0. This characteristic allows it to effectively form durable pigment coatings even at lower pH levels.

Conflicts

  • Potential interactions with other skincare ingredients may occur, which could alter their intended efficacy or lead to adverse reactions.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
2.6%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has concluded Triethoxycaprylylsilane is safe for use in cosmetics under established practices and concentrations, specifically up to 2.6% in suntan products. The Scientific Committee on Consumer Safety (SCCS) additionally affirms its safe application as a coating agent for sunscreen actives.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Triethoxycaprylylsilane is a valuable ingredient, widely incorporated for its efficacy in improving pigment performance and formulation stability, while also providing mild skin conditioning benefits.

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