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BEHENOYL STEARIC ACID.

Valuable / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A high-performance 12-hydroxystearic acid ester that serves as both a sophisticated structuring agent and a lipid-mimetic emollient. It is specifically engineered to provide a breathable, non-greasy protective barrier while stabilizing complex emulsions without the heavy residue associated with traditional waxes.

Emollient Emulsifying Agent Structuring Agent Skin Conditioner Occlusive

Science

It functions by organizing the oil phase of an emulsion into a stable lamellar network, which effectively traps water to prevent evaporation. On the skin surface, it mimics natural lipid structures to reinforce the moisture barrier, plasticizing other oils in the formula to create a dry-touch, 'waxy' finish that improves overall sensory elegance.


Research

High confidence
Effective range 1–10%
Optimal

2.4%

Key findings

  1. 01 Demonstrated as an efficient emulsifying agent capable of stabilizing water-in-oil systems with up to 75% water content while maintaining a superior sensory profile compared to beeswax.
  2. 02 Regulatory assessments by the TGA (2024) identify a 2.4% concentration as the maximum threshold for optimal safety and efficacy in topical dermal applications.

Transparency

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

Because it is primarily used for its physical structuring and emulsification properties, use below 1% typically suggests it is being used for label claims rather than functional emulsion stability or barrier protection.


The Formula

Solubility
Oil
Optimal pH 4 – 7
0 7 14

Stability

Enhances thermal stability in water-in-oil systems, with an emulsion inversion temperature range of 56°C to 85°C. It is a reliable vegan alternative to beeswax.

Synergies

  • Water-in-oil emulsifiers
  • Non-polar emollient oils
  • Mineral UV filters

Conflicts

  • Polar oils without secondary stabilizers
  • Ophthalmic formulations
  • Certain anhydrous systems requiring specific crystallization ratios

Safety

CIR Status
Safe as used
Max tested
2.4%
Pregnancy
Safe
Sensitization risk Low

While generally safe, recent 2024 TGA guidelines limit its use to 2.4% in topical medicines. It should not be used in products intended for the eyes.


Your Skin

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

Our Assessment

Valuable

An exceptional structuring lipid for creating lightweight yet highly protective barriers, particularly in formulations targeting skin recovery and water resistance.


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References