silicon dioxide powder or silicon (iv) oxide in petri dish

silicon dioxide amorphous pure silica white tooth powder anticaking agent prevents caking clumping e551 food additive sio2 siliconiv oxide lab laboratory petri dish nanoparticles toxic dust aerosil cosmetic products toothpaste crystalline chemical dispersed silicea precipitated hygroscopic compound antifoam calcium desiccant pyrogenic pharmaceuticals dangerous silicic kaolin dietary supplements sand top view anti-caking agent highly used cosmetics