Check the listing for details. Silicon Dioxide [SiO2] 99.6% Pharmaceutical Grade Powder 1 Lb in Two Bottles. Condition: New. Listed at 70.99 USD. SILICON DIOXIDE. Weight: 1 Pound (16 Ounces) Purity: 99.6% Pure Grade: Pharmaceutical Texture: Fine Powder CAS Number: 7631-86-9 You are buying 1 Pound of Silicon Dioxide. The item ships in 2 polypropylene bottles. Silicon Dioxide (SiO2), also known as Silica, has hundreds of uses. SHIPS FAST FROM CALIFORNIA, USA! 1-3 day transit time throughout the country. We ship three times a day; so your item is guaranteed to go out the very same day you place your order. Our bottles are made of sturdy polypropylene. The square, “space-saver” shape ensures that the bottles fit snugly on a shelf. The wide mouth makes for easy dispensing and stackability. To ensure a spill-free journey, we shrink-wrap the screw tops and seal the bottles in plastic.