Polyglyceryl-6 Dicaprate is a plant-derived ester that functions as a high-performance skin conditioner and mild emulsifier. It is particularly valued in cleansing formulations for its ability to stabilize oil-to-milk textures, ensuring effective debris removal without disrupting the skin’s lipid barrier.
- INCI Name:
- Polyglyceryl-6 Dicaprate
- Chemical/Scientific Name:
- Hexaglycerol Dicaprate; Decanoic acid, diester with hexaglycerol
- Common Aliases:
- Polyglyceryl-6 Caprate (similar derivative), Hexaglyceryl Dicaprate
| Category: | Emulsifiers |
| Source Origin: | Vegetable (derived from Glycerin and decanoic acid) |
| Comedogenic Rating: | 0-1 |
| Primary Industries: | Cosmetics, Personal Care |
| Solubility: | Lipophilic (Oil-soluble), water-dispersible |
At a Glance: Properties & Effects
| Texture Enhancement: | |
| Hydration/Moisture: | |
| Formula Stability: | |
| Irritation Risk: |
Primary Benefits:
- Facilitates easy rinsing of anhydrous (oil-based) products.
- Provides a non-greasy, silky emolliency to the skin surface.
- Stabilizes oil-in-water emulsions with high electrolyte tolerance.
- Offers gentle surfactant activity suitable for sensitive skin.
Potential Risks:
- Generally regarded as non-irritating and non-sensitizing.
Biological Action & Cosmetic Profile
Structurally, this molecule consists of a hexaglycerol backbone esterified with two molecules of decanoic (capric) acid. The polyglycerol component provides humectant properties by attracting moisture to the upper layers of the stratum corneum. Simultaneously, the fatty acid chains integrate into the skin’s surface, filling gaps between desquamating corneocytes to smooth texture and reduce transepidermal water loss (TEWL).
In the context of cleansing chemistry, Polyglyceryl-6 Dicaprate acts as a medium-HLB (Hydrophilic-Lipophilic Balance) surfactant. It lowers the interfacial tension between oils and water, allowing heavy sunscreens and makeup to be encapsulated into micelles. This mechanism ensures that oil cleansers emulsify upon contact with water, transitioning from a lipid phase to a milky dispersion that rinses away without leaving a comedogenic film.
Skin-feel is significantly improved when this ester is used in place of traditional ethoxylated surfactants (PEGs). Because it is a non-ionic agent, it does not denature skin proteins or strip the essential mantle. Formulators prioritize this ingredient in “clean beauty” profiles as a biodegradable, PEG-free alternative that maintains high efficacy in removing sebum-bound impurities.
Broader Applications & Origins
Manufacturing of this ingredient typically involves the polymerization of Glycerin followed by esterification with capric acid, often derived from coconut or palm kernel oil. This process results in a versatile ingredient used not only in facial oils but also in luxury body washes and hair care. In hair formulations, it provides lightweight conditioning by smoothing the cuticle without the weighing effect often associated with heavy silicones.
Routine Integration
Synergies:
- Caprylic Capric Triglyceride: Enhances the spreadability and solvent power of cleansing balms.
- Squalane: Works in tandem to restore the lipid barrier during the cleansing process.
- Tocopherol: Stabilizes the fatty acid components against oxidation in anhydrous formulas.
- Helianthus Annuus Seed Oil: Provides a rich base for emulsification in massage oils.
Conflicts:
- Universally compatible; no known clinical conflicts with common actives like Retinol or Ascorbic Acid.
Clinical Consensus & Safety
Dermatological assessments by the Cosmetic Ingredient Review (CIR) Expert Panel conclude that polyglyceryl fatty acid esters are safe for use in cosmetic concentrations. Clinical trials using Human Repeat Insult Patch Tests (HRIPT) indicate that Polyglyceryl-6 Dicaprate is non-sensitizing and does not cause significant ocular or dermal irritation. Its large molecular size prevents deep follicular penetration, which contributes to its low comedogenic profile and suitability for acne-prone skin types.
Is Polyglyceryl-6 Dicaprate safe for acne-prone skin?
Yes. It has a very low comedogenic rating and is specifically designed to help oils rinse off the skin, preventing the pore-clogging residue often associated with traditional oils.
Is this ingredient considered “natural”?
Polyglyceryl-6 Dicaprate is generally considered a naturally-derived ingredient. It is synthesized from vegetable-sourced fatty acids and Glycerin, making it a common choice for ECOCERT or COSMOS-compliant formulations.
Does it function as a preservative?
While it is not a registered preservative, certain polyceryl esters exhibit mild antimicrobial properties by disrupting the cell membranes of specific bacteria. However, it should always be used alongside a dedicated preservative system like Phenoxyethanol or Sodium Benzoate.