Allyl Methacrylates Crosspolymer

Allyl Methacrylates Crosspolymer is an inert, high–molecular weight crosslinked polymer used at low levels as a thickener/film former, and it is not bioactive or pH-dependent at typical cosmetic use concentrations. Clinical irritation potential is generally very low, with reactions more likely related to mechanical residue or impurities than the polymer itself. For severely compromised or post-procedure skin, I still assign a small nonzero risk out of caution because acrylate-derived materials can rarely be implicated via trace residual monomers/processing contaminants. Safety Notes: Allyl Methacrylates Crosspolymer is used as a texturizer/absorbent polymer for slip, soft-focus, and oil-control; in many leave-on lotions, sunscreens, and primers it appears at very low levels (about 0.05–0.3%) to tweak sensory and stabilize feel without thickening. In mattifying primers, blurring powders/solid formats, and high-oil-absorption “pore-filling” leave-on products, it can be a primary structuring/feel component and is seen in the low single digits up to ~8% in consumer OTC products. Rinse-off products typically sit toward the low end because the sensory benefit is less persistent, while high-end leave-on color/complexion-adjacent skincare drives the upper bound.