High-molecular-weight anionic polymer – stabilizer and film-former in makeup and hair care. In skincare appears rarely, usually in sunscreens and long-wear foundations. Does not penetrate the skin.
Topical application
BLimited evidence. One RCT or several controlled studies with limitations.
Functional polymer. Safety confirmed by CIR. No standalone skin activity.
Sodium Polystyrene Sulfonate (SPS) is a high-MW anionic polymer. In medicine it is taken orally to correct hyperkalemia. In cosmetics it serves as a stabiliser and film-former in colour cosmetics and some sunscreens. Mechanism. The molecule is large and does not penetrate the skin. Forms a thin surface film that fixes pigments and improves product water-resistance. In shampoos and styling products it works as a fixative. Where applied. Long-wear foundations, some water-resistant sunscreens, mascaras, hair products. Rare in skincare. Safety. CIR confirmed safety at cosmetic concentrations. No systemic absorption through intact skin. Non-comedogenic. Pregnancy and lactation – safe in cosmetic formats. Medical oral SPS – by prescription only.
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.
Sodium Polystyrene Sulfonate is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
Sodium Polystyrene Sulfonate suits: normal, dry, combination, oily, sensitive.
High-molecular-weight anionic polymer – stabilizer and film-former in makeup and hair care.
The INCI name is Sodium Polystyrene Sulfonate. It may also appear as: SPS, Натрия полистиролсульфонат.
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