POLYQUATERNIUM-39
Is POLYQUATERNIUM-39 safe for seborrheic dermatitis?
Polyquaternium-39 has a lower-concern editorial label for seborrheic dermatitis. It is a cosmetic polymer used for antistatic and film-forming functions, with a safety assessment covering the uses reviewed.
The assessment's limited irritation data are not a guarantee for every person or product. No applicable human seb derm or exact-ingredient Malassezia study was found. In a hair product, scalp contact and the rest of the formula still matter; rinse as directed and change products if discomfort repeatedly follows use.
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What is it?
A quick identity check, separate from the seb derm guidance above.
01 / 05- Material type
- Cosmetic conditioning polymer
- Cosmetic function
- Antistatic, Film Forming
What is POLYQUATERNIUM-39 used for in skincare?
Polyquaternium-39 is a polymer listed for reducing static and forming a film. These roles are useful in the feel and handling of hair-care products, rather than as a treatment for scaling or yeast. A formula may use it alongside other conditioning ingredients, but its technical role does not establish the tolerance of that combination.