BENTONITE

Bentonite is a naturally occurring swelling clay mineral formed from the weathering of volcanic ash, composed predominantly of montmorillonite, a phyllosilicate mineral with a characteristic layered platelet structure. Its unique ability to absorb several times its own weight in water causes it to swell and form a thixotropic gel, making it invaluable in rinse-off formulations, masks, and suspensions. Formulators prize bentonite for its dual role as both a rheology modifier and an adsorbent of sebum and impurities, making it a cornerstone ingredient in clay masks, dry shampoos, and mineral sunscreens.