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Film Former

PEI-35

CAS 9002-98-6
40

Safety score · 0–100

Moderate

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

A cationic polymer used to deposit actives onto hair and skin. The neat material is corrosive and irritating; in finished cosmetics it is diluted but still a watch-it ingredient, especially in leave-on.

Function

VISCOSITY CONTROLLING

Skin benefits

  • Cationic film-former
  • Conditioning in hair products
  • Boosts deposition of actives

Known concerns

  • Bulk PEI is corrosive (GHS H314)
  • Skin and eye irritation potential
  • Cationic toxicity to aquatic life

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

Related film formers

40
4,4'-ISOPROPYLIDENEDIPHENYL/EPICHLOROHYDRIN COPOLYMER DIACRYLATE
Film Former
 40
BIS-(DITRIMETHYLOLPROPANE TRIACRYLATE) HEXANEDICARBAMATE
Film Former
 40
C5-6 OLEFIN/STYRENE COPOLYMER
Film Former
 40
COLLODION
Film Former
 40
DIBUTYL MALEATE
Film Former
 40
PTFE
Film Former
 40
TETRAETHYL ORTHOSILICATE
Film Former
 40
TOSYLAMIDE/EPOXY RESIN
Film Former

Check your shelf

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Scan any cosmetic product with LuxSense to see if it contains PEI-35 and get a full ingredient breakdown with safety scores.

This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.