What it is
Polyquaternium-80 is one of a large family of polyquaternium polymers carrying positively charged (quaternary ammonium) groups along the chain. The cationic charge helps the polymer deposit onto and bind to skin, where it forms a thin flexible film that can improve smoothness, slip, and the staying power of other ingredients. In sunscreens it is typically used at low levels to refine texture and help the product spread and set evenly.
Safety & warnings
Polyquaternium polymers are generally well tolerated in leave-on cosmetics and are used at low concentrations. They are not associated with significant irritation or comedogenicity at typical use levels.
Origin & sourcing
Synthetic polymer produced by polymerization; not derived from a natural source.
Questions everyone asks
What does polyquaternium-80 do in a sunscreen?
It acts as a film former and conditioning agent, helping the product spread smoothly, adhere to the skin, and leave a refined feel.
Is polyquaternium-80 natural or synthetic?
It is a synthetic cationic polymer made by polymerization, not extracted from a plant or animal source.