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Polyquaternium-4
Polyquaternium-4
Low concern
Polyquaternium polymers (including PQ-4) have been reviewed by CIR for cosmetic use and are considered safe in current practices. Not authorized for food use; no notable systemic toxicity at incidental exposures.
Found in
7 products
What it is
A cationic cellulose-based polymer used as a hair-conditioning and antistatic agent.
Cosmetic film former and conditioning agent; not a food ingredient.
Why it's flagged
- primarily a cosmetic ingredient, not a food additive
What regulators actually say
"Polyquaternium polymers reviewed by CIR Expert Panel for safe cosmetic use."
Regulatory status
United States — FDA
Cosmetic ingredient; not a listed food additive.
European Union — EFSA
Not authorized as a food additive.
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