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APRICOT KERNEL OIL POLYGLYCERYL-4 ESTERS.

Valuable CAS - / SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

An advanced, amphiphilic derivative of apricot kernel oil that merges the lipid-replenishing benefits of plant oils with the versatility of a high-tolerance surfactant. This precision-engineered ester allows for the seamless integration of essential fatty acids into water-based formulas while acting as a gentle yet effective cleansing agent.

Emollient Non-ionic Surfactant Skin Conditioning Agent Co-emulsifier

Science

By undergoing transesterification with polyglycerin-4, the apricot kernel oil becomes water-dispersible while retaining its nutrient profile. It functions as a non-ionic co-emulsifier that reduces interfacial tension, facilitating the delivery of oleic and linoleic acids to the skin barrier. Additionally, it serves as a 'superfatting' agent, depositing a breathable, protective lipid film that prevents moisture loss during and after the cleansing process.


Research

High confidence
Effective range 3.8–40%
Optimal

5%

Key findings

  1. 01 In a 58-day clinical evaluation of a serum containing approximately 4% of this ester, researchers observed a 54% decrease in carbonylated proteins and a 32% rise in Collagen 1, highlighting its role in supportive, restorative formulations.
  2. 02 Safety assays utilizing HET-CAM and SkinEthic™ models confirmed that even at high concentrations of 30-40%, the ingredient remains a non-irritant with exceptional ocular tolerance.

Transparency

Not commonly dusted
Min. effective
3%
Red flag below
1%

Because it functions as both a functional emulsifier and an active emollient, concentrations below 1% are typically insufficient to provide meaningful skin-conditioning or cleansing benefits.


The Formula

Solubility
Both
Optimal pH 4.5 – 7
0 7 14

Stability

Demonstrates robust stability in complex emulsions due to its high oleic acid content and resistance to electrolytes. To prevent oxidation of unsaturated fatty acids, it should be protected from light and heat.

Synergies

  • Humectants
  • Other plant-derived esters
  • Low-HLB surfactants

Conflicts

  • Strongly alkaline environments (pH > 8.0)
  • Strong oxidizing agents

Safety

CIR Status
Safe as used
Max tested
40%
Pregnancy
Safe
Sensitization risk Low

Recognized by the CIR Expert Panel as safe and non-sensitizing even at high concentrations in rinse-off or leave-on microemulsions.


Your Skin

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

Our Assessment

Valuable

A highly biocompatible multifunctional ingredient that bridges the gap between effective cleansing and deep emolliency without irritation.


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