Silica is usually referred to the natural quartz sand（that is: SiO2）, which is an important chemical raw material, mainly used to manufacture fire-resistant brake, mono-crystalline silica and cement and other uses.
Product Specifications
| Chemical formula | Chemical composition | Density, g/cm3 | Mohs hardness |
|---|---|---|---|
| SiO2 | SiO2 − 97.5-99.8%, Al2O3 − 0.05-2%, Fe2O3 − 0.02-0.05% | 2.65 | 7 |
