Silicon Dioxide(CAS: 91053-39-3)

Silicon Dioxide (CAS: 91053-39-3) is an amphoteric oxide with a crystalline form, often found as quartz or cristobalite. Its molecular weight is approximately 60.08 g/mol. It is insoluble in water and most organic solvents. Chemically, it is highly stable and reacts minimally with acids and bases. Silicon dioxide is a semiconductor at high purity, making it useful in electronic applications.

Silicon Dioxide is typically synthesized by heating silicon with oxygen, or by oxidizing silicon metal. Common methods include the direct oxidation of silicon in air or using water glass (sodium silicate) as a precursor. The process can also involve the hydrolysis of silicon tetrachloride, producing silica gel which can be dehydrated to form the solid form.

Silicon Dioxide is widely used in industries such as electronics, glass manufacturing, ceramics, and construction. In electronics, it is used as an insulator in semiconductors. In glass manufacturing, it acts as a flux and gives the glass its characteristic properties. It is also used in the production of optical fibers, pharmaceuticals, and as a filler in polymers.

Silicon Dioxide is generally safe but can be dusty, which may pose inhalation risks. It should be handled in a well-ventilated area and with the use of personal protective equipment (PPE), such as safety goggles, gloves, and a dust mask. Spills should be cleaned up carefully using a vacuum cleaner or a damp mop to avoid dust generation. Always refer to the Safety Data Sheet (SDS) for detailed safety information.