CheckVegan

Is PEI-42 vegetarian?

PEI-42

Vegetarian Vegetarian
Vegan Vegan

PEI-42 is a synthetic polymer of ethylenimine (polyethylenimine) used in cosmetic formulations as a film-forming or conditioning agent.

Also known as Polyethylenimine-42
INCI name PEI-42
CosIng ID 98450
Last reviewed 4 July 2026

An ingredient is considered vegetarian if it avoids components derived from killing an animal.

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