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POLYGLYCERYL-3 CAPRYLATE.

Valuable CAS 108777-93-1 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

Polyglyceryl-3 Caprylate is a multifunctional ingredient primarily recognized for its role in stabilizing cosmetic formulations by binding water and oil phases. It also functions as a gentle cleansing agent, offers mild antimicrobial properties, and contributes to skin hydration and a softer skin feel.

Summary

Emulsifying Agent Surfactant Mild Antimicrobial Light Moisturizer Refatting Agent Product Stabilizer Texture Enhancer Penetration Enhancer

Science

Mechanism of Action

This ingredient operates principally as an emulsifying agent, effectively reducing the interfacial tension between water and oil to create stable, homogeneous formulations. As a surfactant, it aids in cleansing by decreasing surface tension and facilitating foam production. Furthermore, Polyglyceryl-3 Caprylate demonstrates mild antimicrobial activity, specifically limiting the proliferation of bacteria and yeast to help prevent body odor. It also provides light moisturizing benefits by supporting skin hydration and acting as a refatting agent, which helps maintain a soft skin texture and can enhance the penetration of other active ingredients into the skin.

Research

Clinical Evidence

Medium confidence
Effective range 1–6%
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

Polyglyceryl-3 Caprylate is an excipient with well-defined functional roles as an emulsifier, surfactant, and mild antimicrobial, rather than a primary active ingredient susceptible to 'dusting' for marketing purposes.

The Formula

Formulation

Solubility
Water
Optimal pH 4 – 8
0 7 14

Stability

This ingredient maintains stability within a pH range of 4.0 to 8.0 and is generally heat tolerant, though temperatures exceeding 80°C should be avoided. Its performance as an emulsifier may diminish when combined with highly acidic or alkaline active ingredients. While generally water-soluble, studies on similar polyglyceryl-3 caprylate esters suggest that at higher concentrations (e.g., 10 wt%), it might exhibit weak interaction with water, potentially leading to phase separation.

Conflicts

  • Very acidic active ingredients (may reduce emulsifier performance)
  • Very alkaline active ingredients (may reduce emulsifier performance)

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has determined that polyglyceryl fatty acid esters, including Polyglyceryl-3 Caprylate, are safe for use in cosmetics when properly formulated to be non-irritating. It presents a low risk of causing irritation or allergic reactions and is generally well-tolerated, including by individuals with sensitive skin.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Polyglyceryl-3 Caprylate is a valuable ingredient, essential for stable cosmetic formulations due to its emulsifying and surfactant properties, while also providing mild antimicrobial, moisturizing, and skin-conditioning benefits across all skin types.

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