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TETRADECYLOCTADECYL STEARATE.

Valuable / BINDING, EMULSION STABILISING, FILM FORMING, OPACIFYING, SKIN CONDITIONING

A synthetic specialty wax, Tetradecyloctadecyl Stearate acts as an effective occlusive skin-conditioning agent, precisely preventing moisture loss. It simultaneously functions as a nonaqueous viscosity-increasing agent, optimizing formulation texture for a refined skin experience.

Summary

Emollient Skin-conditioning agent Viscosity controlling

Science

Mechanism of Action

This high molecular weight synthetic ester functions by forming an occlusive barrier on the skin's surface. This physical barrier significantly reduces transepidermal water loss, effectively conditioning the skin and preventing dehydration. With a melting point just below body temperature, it seamlessly integrates into cosmetic matrices, also enhancing product viscosity and texture.

Research

Clinical Evidence

High confidence
Effective range 0.7–28%
Optimal

N/A

Key findings

  1. 01 Clinical tests at 10.4% concentration confirmed the absence of significant irritation in human subjects.
  2. 02 A human repeated-insult patch test (HRIPT) conducted with 21% concentration demonstrated non-sensitizing and non-irritating properties.
  3. 03 Lip balms containing up to 28% Tetradecyloctadecyl Stearate exhibited good dermatological tolerance in comprehensive use tests involving 12-13 subjects per formulation.

Transparency

Dusting Analysis

Not commonly dusted

No data is available regarding the dusting properties or thresholds for Tetradecyloctadecyl Stearate.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

The ingredient demonstrates stability under recommended storage conditions. As an ester, it is generally susceptible to hydrolysis at extreme pH levels; however, no specific optimal pH range for its stability was identified. It is highly compatible with oils, silicones, surfactants, and emulsifiers, allowing for versatile formulation.

Synergies

  • oils
  • silicones
  • surfactants
  • emulsifiers

Conflicts

  • strong oxidizing agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
28%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Octyldodecyl Stearoyl Stearate, a related ingredient, is safe for use in cosmetics under current practices and concentrations when formulated to be non-irritating. This safety assessment was re-evaluated in 2022 to address significant increases in concentration of use (up to 28%), with its safety conclusion being re-affirmed based on new data. No significant systemic availability or toxicity is expected. Tetradecyloctadecyl Stearate is also listed in the FDA's Global Substance Registration System (GSRS).

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Tetradecyloctadecyl Stearate is a valuable ingredient, particularly beneficial for dry and sensitive skin, owing to its proven efficacy in moisture retention and its excellent safety profile, even at high concentrations.

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