Acrylates/C10-30 Alkyl Acrylate Crosspolymer

Acrylates/C10-30 Alkyl Acrylate Crosspolymer is a high–molecular weight synthetic polymer used primarily as a thickener/stabilizer (typically ~0.1–1%), and it is generally too large to penetrate skin, so true irritation is uncommon. Clinical experience and patch-test data suggest a low but nonzero risk of irritation in highly reactive or eczema-prone patients, often related to formulation factors (pH/neutralizers, residual monomers, or high film-former load) rather than the polymer itself. Given the vulnerable populations considered here, it is best categorized as very gentle rather than completely inert. Safety Notes: In commercial leave-on gels, lotions, sunscreens, and serums this polymer is commonly used as a neutralized rheology modifier/suspending agent at very low levels (~0.05–0.2%) to build yield value and stabilize emulsions without noticeable tack. Standard consumer creams and mineral sunscreens often sit around ~0.2–0.8% for stronger viscosity and pigment suspension, while high-viscosity clear gel textures (including some high-hold styling/gel-cream formats sold OTC) can reach about 1.0–2.0% in finished product when paired with appropriate neutralization; above this becomes increasingly difficult due to tack, stringiness, and diminishing returns. Rinse-off products generally use similar or slightly lower levels than leave-on because less structure is needed after dilution, but the same overall market range is observed across OTC formats.