Boron Nitride (BN) is a chemically stable compound of nitrogen and boron. It has become a popular cosmetic ingredient because of its unique combination of silky feel, skin adhesion, and processability.
Inorganic compounds
You may have heard of mineral sunscreens, sulfur for acne treatment, or miraculous clay face masks. These skin care products are based on inorganic compounds and minerals. Some inorganic compounds cannot penetrate dermal layers, yet do an excellent job on the skin's surface. E.g. main ingredients of mineral sunscreens are Zinc Oxide and Titanium Oxide.
Others are well absorbed and influence aspects of the skin from within: interaction with skin antioxidant enzymes, influence on collagen production, and antibacterial activity turn minerals into strong advocates of the firm and flourishing skin.
Calcium silicate is an inorganic ingredient with limited use in cosmetics applications. Various types of calcium silicates differ significantly in morphology, allowing both porous and non-porous types to be produced synthetically.
Magnesium Aluminum Silicate (MAS) is a white, highly purified mineral derived from smectite clays. It serves as stabilizing, suspending, and emulsifying agent for cosmetic formulations.