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Moumoujus

ISOBUTYLPHENOXY EPOXY RESIN.

Avoid CAS 67924-34-9 / FILM FORMING

ISOBUTYLPHENOXY EPOXY RESIN functions primarily as a film-forming agent, creating a continuous layer on skin, hair, or nails. However, its use in cosmetic formulations is heavily restricted due to significant safety concerns, including a ban in the European Union.

Summary

Film-forming

Science

Mechanism of Action

This ingredient forms a durable, continuous film on surfaces. As a type of epoxy resin, it is designed to undergo a curing reaction, often with a hardener, to establish stable, cross-linked polymer networks known for their adhesive properties, chemical resistance, and toughness.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Epoxy resins typically achieve stability through a curing reaction, forming a robust, cross-linked polymer structure. Its stability in a cosmetic product is thus highly dependent on its state (uncured vs. cured) and specific formulation. With an estimated logP of 3.431, it exhibits a preference for oil solubility and low water solubility.

Conflicts

  • Banned for cosmetic use in the European Union, rendering it incompatible with formulations intended for the EU market.
  • High potential to induce allergic contact dermatitis, particularly in its uncured form or when co-formulated with hardeners like amines.
  • Significant risk of skin irritation and sensitization.

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk High

ISOBUTYLPHENOXY EPOXY RESIN is explicitly banned or deemed unsafe for cosmetic applications within the European Union. EWG Skin Deep identifies it with high use restrictions and significant concerns regarding allergies and immunotoxicity. Structurally, general epoxy resins are often derived from Bisphenol A (BPA), a Substance of Very High Concern (SVHC) under REACH, recognized for its reproductive toxicity and endocrine-disrupting properties. Uncured forms of epoxy resins and their associated curing agents are well-documented irritants and sensitizers, frequently causing allergic contact dermatitis.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy High
Comedogenicity Unknown

Our Assessment

Verdict

Avoid

Due to its ban in the EU, high sensitization risk, and potential endocrine-disrupting properties, ISOBUTYLPHENOXY EPOXY RESIN is an ingredient to be strictly avoided in skincare formulations.

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