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ETHYLHEXYL STEAROYL POLYHYDROXYSTEARATE.

Valuable CAS 1423155-00-3 / SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - CLEANSING

This multi-functional ester acts as a skin-conditioning emollient, forming a protective, breathable barrier to minimize moisture loss and shield against environmental stressors. Research indicates it supports strong moisturization, potentially through properties akin to cross-linked Hyaluronic Acid, and can visibly reduce wrinkle appearance after application.

Summary

emollient skin conditioning surfactant

Science

Mechanism of Action

Ethylhexyl Stearoyl Polyhydroxystearate functions as a sophisticated emollient and skin conditioning agent, adept at softening and smoothing the skin. It creates a hydrophobic, yet breathable, film on the skin's surface, effectively preventing water loss and offering protection from environmental aggressors. Beyond its barrier function, it also serves as a solvent, improving the dispersion and distribution of other formulation components.

Research

Clinical Evidence

Medium confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 A study reported Ethylhexyl polyhydroxystearate's strong moisturizing properties, attributed to its association with cross-linked Hyaluronic Acid, enabling it to act as a topical dermal filler and rapidly diminish the appearance of wrinkles after application.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

This ingredient demonstrates excellent emulsion stabilization, even at low inclusion rates. It is particularly effective in low-viscosity water-in-oil (W/O) lotions, including those with minimal oil phase content (as low as 18-20%). Its compatibility extends to high concentrations of silicone oils, such as cyclopentasiloxane, and it can also function as a thickening agent when combined with consistency-enhancing waxes like high-melting hydrocarbon waxes or beeswax.

Synergies

  • High contents of silicone oils (e.g., cyclopentasiloxane)
  • Consistency-enhancing or emulsion-stabilizing waxes (e.g., high-melting hydrocarbon waxes, beeswax)

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

While a direct Cosmetic Ingredient Review (CIR) safety assessment for Ethylhexyl Stearoyl Polyhydroxystearate is not available, its constituent components, Polyhydroxystearic Acid and Hydroxystearic Acid, have been deemed safe by the CIR Expert Panel when formulated to be non-irritating and non-sensitizing. Similarly, related compounds like Ethylhexyl Stearate and Ethylhexyl Hydroxystearate are recognized as safe for cosmetic applications, exhibiting low toxicity and minimal irritation risk. SkinSAFE further supports its mild profile by classifying it as 'Irritant Free', 'Teen SAFE', 'Baby SAFE', and 'Eyelid SAFE'. Regulatory bodies such as the EU and FDA currently permit the unrestricted use of Ethylhexyl Hydroxystearate, suggesting a favorable safety outlook for this related compound.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

This versatile ingredient offers strong moisturizing and barrier-forming properties, effectively reducing wrinkle appearance while maintaining excellent safety and broad skin type compatibility across numerous formulations.

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