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STEARYL BEESWAX.

Valuable CAS 223705-72-4 / SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

Stearyl Beeswax, an ester derived from natural beeswax, is a sophisticated ingredient engineered to enhance skin barrier function and deliver profound hydration. It forms a protective, non-comedogenic layer, visibly smoothing and softening the skin's surface for a refined complexion.

Summary

emollient skin conditioning skin protectant occlusive agent humectant

Science

Mechanism of Action

This advanced derivative integrates seamlessly with the skin's lipid mantle, a crucial component of the stratum corneum. Upon application, it partially melts from body heat, interacting with natural ceramides and free fatty acids to reinforce and restore the integrity of the lipid barrier. Functionally, Stearyl Beeswax acts as a multifaceted skin protectant, safeguarding against environmental stressors while simultaneously acting as an occlusive agent to significantly minimize transepidermal water loss. Its humectant properties attract and lock in hydration, while its emollient nature visibly softens and smooths the skin. Furthermore, similar to its parent compound, beeswax, it is expected to contribute anti-inflammatory benefits due to naturally occurring flavonoids and phenolic compounds, promoting overall skin health.

Research

Clinical Evidence

High confidence
Effective range 1–25%
Optimal

N/A

Key findings

  1. 01 Formulations containing beeswax, a key component, consistently increase the moisture content of the stratum corneum by 15-20% within 8 hours after application, observed across various product types including creams, lip balms, and anti-aging serums.

Transparency

Dusting Analysis

Not commonly dusted

Stearyl Beeswax functions primarily as an emollient, occlusive, and skin conditioning agent, rather than a precision active ingredient with a specific minimum effective dose typically associated with 'dusting'.

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Stearyl Beeswax exhibits excellent solubility in fats and oils and possesses intrinsic emulsifying properties, facilitating the creation of stable water-in-oil or oil-in-water emulsions. In formulations utilizing higher concentrations (typically above 5%), the presence of free fatty acids may subtly decrease the overall pH; this can be precisely managed by incorporating a calculated amount of alkali into the aqueous phase to maintain optimal emulsion characteristics and texture.

Synergies

  • barrier-supportive ingredients
  • hydrating agents

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
56%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) deems Stearyl Beeswax safe for cosmetic applications, albeit with specified concentration limits. The CIR also noted 'skin/eye/lung irritation - weight of evidence unknown/unassessed' for Stearyl Beeswax. However, its progenitor, Beeswax (Cera Alba), has been thoroughly assessed by CIR and found safe at current concentrations and uses, historically reaching up to 56% in certain lip products. The U.S. FDA also recognizes beeswax as Generally Recognized As Safe (GRAS) for food use. The Scientific Committee on Consumer Safety (SCCS) has not yet issued a specific assessment for Stearyl Beeswax.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Stearyl Beeswax is a valuable, multifunctional ingredient that precisely enhances skin hydration and barrier integrity, making it highly suitable for a wide range of sophisticated skincare formulations.

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