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Moumoujus

GLYCERYL CAPRYLATE.

Valuable CAS 26402-26-6 / SKIN CONDITIONING - EMOLLIENT, SURFACTANT - EMULSIFYING

Glyceryl Caprylate is a versatile plant-derived ester prized for its multifunctional properties in skincare formulations. It acts as an effective emulsifier, a potent antimicrobial agent, and a skin-conditioning emollient, contributing to product stability and skin health.

Summary

Emollient Emulsifying Hydration Antimicrobial Preservative Booster Refatting Penetration Enhancer Viscosity Modifier

Science

Mechanism of Action

This multifunctional ester primarily functions as an emulsifier and co-emulsifier, stabilizing oil-in-water emulsions by reducing interfacial tension and preventing phase separation. Its significant antimicrobial activity stems from its ability to disrupt microbial cell membranes, thereby inhibiting the growth of various bacteria, yeasts, and fungi. Glyceryl Caprylate also enhances skin hydration by acting as an emollient to soften the skin and as a humectant to attract and bind water molecules. Additionally, it can modulate skin permeability to facilitate the transdermal delivery of hydrophilic ingredients and offers viscosity-modifying properties.

Research

Clinical Evidence

High confidence
Effective range 0.3–2%
Optimal

0.5%

Key findings

  1. 01 Demonstrates refatting and antimicrobial properties, and significantly boosts the performance of preservative systems.
  2. 02 When integrated with other preservation methods, it effectively preserves formulations and enhances the skin barrier by decreasing transepidermal water loss (TEWL) and increasing stratum corneum hydration.
  3. 03 Serves as a standard for leave-on emulsion-type products, particularly moisturizers, and is effective as a wetting agent. An ideal dosage of 0.5-1.0% is recommended when utilized primarily as an emollient.
  4. 04 Highly recommended for enhancing microbiological stability and as a potent preservative booster.

Transparency

Dusting Analysis

Commonly dusted
Min. effective
0.3%
Red flag below
0.25%

While beneficial at low concentrations, Glyceryl Caprylate's primary active functions, such as preservative boosting and emollience, are typically observed from 0.3% upwards. Formulations featuring it below this threshold may not fully leverage its reported efficacy.

The Formula

Formulation

Solubility
Both
Optimal pH 4 – 7.5
0 7 14

Stability

Optimal stability and activity are maintained within a pH range of 4.0 to 7.5. The ingredient exhibits heat tolerance up to 80°C and has a melting point of approximately 30°C.

Synergies

  • Other preservatives (as a booster)
  • Hydrating ingredients (to enhance moisture retention)
  • Emulsifiers (as a co-emulsifier to stabilize emulsions)

Conflicts

  • Not suitable as a standalone preservative; requires co-preservatives.
  • Ineffective as a preservative in cleaning formulations containing surfactants.
  • Requires a solubilizer for integration into water-based products devoid of alcohol.
  • May lead to decreased emulsion viscosity at higher concentrations.
  • Incompatible with strong oxidizing agents and strong alkalies.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
5%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that glyceryl monoesters, including Glyceryl Caprylate, are safe in cosmetic products at current use concentrations. It is generally well-tolerated, demonstrating low irritancy and non-sensitizing properties at recommended levels; a repeated insult patch test (RIPT) at 15% did not induce irritation or sensitization. However, concentrations exceeding 0.3% are not recommended for the eye area due to potential sensitization, and levels above 0.5% in occlusive leave-on balms or face masks can lead to irritation.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Glyceryl Caprylate is a valuable, multifaceted ingredient that enhances both product stability and skin health through its emulsifying, antimicrobial, and moisturizing actions.

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