The main ingredient of Glass is silicon dioxide, but it's a mixture of calcium oxide and sodium oxide. So in a narrow sense, Glass is not silicon dioxide. Glass is amorphous inorganic, nonmetallic material, generally made of a variety of inorganic minerals as the main raw materials, in addition to a small amount of auxiliary raw materials. Its main components are silica and other oxides. Silicon dioxide is a kind of inorganic substance. Silicon and oxygen atoms are arranged in long-range order to form crystalline silicon dioxide and short-range or long-range disordered arrangement to form amorphous silicon dioxide. The two are completely different substances; the former is a nonmetallic material, and the latter is a kind of inorganic substance. Silicon dioxide is an acid oxide, solid at room temperature, and the chemical formula is SiO₂. Silicon dioxide is an acid oxide, solid at room temperature; the chemical formula is SiO₂. Silicon dioxide is insoluble in water and acid but soluble in hydrofluoric acid, hot concentrated phosphoric acid, and fused alkali action. Silica has a wide range of uses, mainly in Glass, water glass, pottery, enamel, etc. Pure natural silica crystal is a hard, brittle, insoluble colourless transparent solid often used in the manufacture of optical instruments. Glass (foreign language name:) amorphous inorganic, nonmetallic materials, generally with a variety of inorganic minerals as the main raw materials, in addition to a small amount of auxiliary raw materials made. If you are looking for high quality, high purity and cost-effective silica, or if you require the latest price of silica, please feel free to email contact mis-asia.