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4,4'-ISOPROPYLIDENEDIPHENOL/EPICHLOROHYDRIN COPOLYMER.

Avoid CAS 25068-38-6 / FILM FORMING

A synthetic epoxy resin polymer that functions as an industrial-grade film former in specialized cosmetic applications. This BPA-based copolymer creates durable, water-resistant coatings but carries significant skin sensitization risks that make it unsuitable for daily skincare routines.

film former

Science

Forms a continuous, adhesive polymer film upon application that provides water resistance and structural integrity through cross-linked molecular bonds with exceptional thermal stability and mechanical strength


Research

Medium confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 Standard concentrations used in patch testing to diagnose contact allergies, confirming its status as a significant skin sensitizer

Transparency

Not commonly dusted
Red flag below
0.1%

Any presence warrants caution due to high sensitization potential and industrial nature


The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Exceptionally stable under normal conditions with resistance to acids and bases, but polymerization reactions can occur with specific chemical triggers

Conflicts

  • Strong oxidizing agents
  • Strong acids
  • Strong bases
  • Primary amines

Safety

CIR Status
Not reviewed
Pregnancy
Caution
Sensitization risk High

EU classified as Skin Sensitizer Category 1 and irritant; contains BPA building blocks raising endocrine disruption concerns


Your Skin

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

Our Assessment

Avoid

An industrial-strength ingredient with high sensitization risk that belongs in specialized applications, not precision skincare formulations.


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