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BETULINYL METHOXY PEG-22 CARBOXYLATE.

Valuable CAS - / SKIN CONDITIONING

A sophisticated, amphiphilic derivative of birch bark extract designed to maximize the delivery of bioactive betulin into the skin. This engineered molecule bridges the gap between botanical potency and modern formulation science, offering enhanced stabilization for delicate skin barriers.

Skin conditioning Antioxidant Anti-inflammatory Elastase inhibitor

Science

By fusing the triterpenoid betulinyl moiety with a carboxylated PEG chain, this ingredient achieves superior water solubility compared to raw betulin. It functions by inhibiting elastase enzymes to preserve dermal structural integrity while providing significant antioxidant protection and reinforcing the lipid barrier through its skin-conditioning properties.


Research

Medium confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 While this specific ethoxylated variant lacks published independent clinical trials, its parent compound, Betulin, is clinically recognized in the Journal of Dermatological Science for its potent anti-inflammatory and barrier-repair capabilities.

Transparency

Commonly dusted

Due to its high cost and specialized nature, this ingredient is often used at sub-functional levels simply to claim 'birch-derived' benefits on a label without providing the actual barrier-repair efficacy of the compound.


The Formula

Solubility
Both
Optimal pH 5 – 8
0 7 14

Stability

Highly stable in the skin-neutral to slightly alkaline range (pH 5.5–8.0). As a carboxylated derivative, it is prone to precipitation in highly acidic environments.

Synergies

  • Vitamin E
  • Ceramides
  • Hyaluronic Acid

Conflicts

  • Cationic surfactants
  • Strong acids (< pH 4.0)

Safety

CIR Status
Not reviewed
Pregnancy
Safe
Sensitization risk Low

Contains a PEG-based chain; while generally safe, it is subject to Proposition 65 general requirements for ethoxylated materials regarding potential trace 1,4-dioxane.


Your Skin

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

Our Assessment

Valuable

An excellent precision-engineered botanical for barrier repair and anti-aging, provided it is formulated within its stable pH window.


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