What it is
Ammonium polyacrylate is the ammonium salt of polyacrylic acid, a water-soluble polymer used to thicken and stabilize cosmetic emulsions. It can also help form a light film that improves the spread and finish of a product. In sunscreens, including tone-up creams, it supports the formula structure rather than providing UV protection.
Safety & warnings
Polyacrylate thickeners are large polymers that stay on the skin surface and are generally well tolerated in leave-on products. It is not a recognized fragrance allergen and is not an oil, so comedogenicity is not a typical concern.
Origin & sourcing
Synthetic polymer made from acrylic acid and neutralized to its ammonium salt form.
Questions everyone asks
What is ammonium polyacrylate used for?
It thickens and stabilizes the formula and can form a light smoothing film, contributing to texture and feel.
Is it related to common gel thickeners?
Yes. It belongs to the polyacrylate family of polymers widely used to control viscosity in cosmetics.