Sodium Acrylates Crosspolymer-2

Sodium Acrylates Crosspolymer-2 is a synthetic polymer thickener/film former used at low levels (typically well under 1–2%) to stabilize gels and improve texture rather than act as a bioactive. In clinical use and patch testing, crosslinked acrylate polymers are generally considered very low-irritant and non-sensitizing, with reactions being uncommon and usually related to damaged barriers or impurities rather than the polymer itself. Given the rare but possible stinging in severely compromised skin, I score it as exceptionally gentle rather than fully inert. Safety Notes: In commercial leave-on emulsions, gels, and sunscreens, Sodium Acrylates Crosspolymer-2 is commonly used as a rheology modifier/suspending polymer at very low levels, with market-observed use down to ~0.05% when paired with other thickeners. Typical mainstream products fall around ~0.1–0.8%, while high-viscosity consumer styling gels, acne gels, and heavy-duty suspending/gel textures can push toward ~1.5–2.5% to build yield value and stabilize particulates. It is used in both leave-on and rinse-off formats, but the highest levels are more often seen in thick leave-on gels where maximum structure and suspension are needed.