Silica

Chemical formula SiO2, molecular weight 60.084

CAS14808-60-7 Toxicity and Hazards: Non-toxic, but long-term inhalation may lead to silicosis.

Regulation Type | Unregulated Density (Room Temperature) 2.2 g/cm³

Melting point 1650 (±50)°C, boiling point 2230°C

Solubility: 0.012g/100ml (in water)

Brief Introduction:

Silica, a chemical term, refers to pure silica, which is colorless and a solid at room temperature. Its chemical formula is SiO2 and it is insoluble in water. It does not dissolve in acids but does in hot concentrated phosphoric acid and reacts with molten alkalis. There are two types of silica in nature: crystalline and amorphous. Silica has a wide range of applications, primarily used in the production of glass, water glass, ceramics, enamelware, refractory materials, aerogel felt, silicon iron, molding sand, elemental silicon, cement, etc. In ancient times, silica was also used to make the glaze and body of porcelain. Most stones are mainly composed of silica and calcium carbonate.

Usage: Silicon dioxide is used in the production of flat glass, glassware, foundry sand, glass fiber, ceramic glaze, rust-preventing sandblasting, filtration sand, flux, refractory materials, and lightweight aerated concrete. The applications of silicon dioxide are extensive. Crystals in nature, when compared, can be used to manufacture important components for the electronics industry, optical instruments, and art crafts. Silicon dioxide is a key raw material for the production of optical fibers. Generally, pure quartz can be used to make quartz glass. Quartz glass has a very low expansion coefficient, equivalent to 1/18 of ordinary glass, and can withstand drastic temperature changes, has good acid resistance (except for HF), hence it is often used to make high-temperature-resistant chemical instruments. Quartz sand is commonly used as glass raw material and building material.

Silica is a key raw material for manufacturing glass, quartz glass, water glass, optical fibers, electronic industry components, optical instruments, arts and crafts, and refractory materials, and is an important material for scientific research.