Cationic polymer. Conditions skin and hair, forms a light film, safe.
Topical application
BLimited evidence. One RCT or several controlled studies with limitations.
Safe conditioner. Allergy is extremely rare.
Polyquaternium-39 (PQ-39) is a cationic polymer. Conditions skin and hair, forms a light film, reduces surfactant-related irritation in cleansers. Where applied. Shampoos, conditioners, shower gels, micellar water, hair products (0.1-2%). Safety. CIR confirmed polyquaternium safety. Hypoallergenic, non-irritating. No systemic absorption through intact skin. Pregnancy and lactation – safe.
Irritation potential
LowAllergen risk
LowPregnancy
SafeSuitable for
The Evigrade extension adds an evidence panel to Wildberries, Goldapple, Letu, iHerb, Sephora and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
Polyquaternium-39 is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
Polyquaternium-39 suits: normal, dry, oily, combination, sensitive.
Cationic polymer.
The INCI name is Polyquaternium-39. It may also appear as: PQ-39.
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