Fumed silica, chemically known as silicon dioxide (SiO2), is a synthetic, amorphous form of silica produced through a flame hydrolysis process. This manufacturing method, often involving the high-temperature reaction of silicon tetrachloride with oxygen and hydrogen, results in an extremely fine, lightweight powder with a very large surface area. NINGBO INNO PHARMCHEM CO.,LTD offers a detailed look into the properties, production, and essential safety considerations of this critical industrial material.

The defining characteristics of fumed silica include its exceptionally high surface area, typically ranging from 50 to 600 m²/g, and its primary particle size, which is in the nanometer range (5-50 nm). These features impart unique functionalities, such as strong thickening, reinforcing, and thixotropic effects when incorporated into various liquid or semi-solid systems. Its purity is also a significant factor, with many grades boasting SiO2 content exceeding 99.8%, making it ideal for demanding applications where contaminants could compromise performance.

While generally considered non-toxic and non-harmful for typical industrial and commercial handling, safety precautions are necessary due to its fine particulate nature. The ultra-lightweight aggregates can easily become airborne. Prolonged or repeated inhalation of airborne dust may cause respiratory irritation. Therefore, proper ventilation and the use of personal protective equipment (PPE), such as dust masks (e.g., N95), gloves, and safety glasses, are recommended when handling large quantities or in areas where dust generation is likely. Good industrial hygiene practices, including washing hands thoroughly after handling and avoiding breathing dust, are crucial.

The versatility of fumed silica means it finds application in a vast array of products, including paints, coatings, adhesives, sealants, plastics, rubber, cosmetics, pharmaceuticals, and food products. Its ability to modify rheology, enhance mechanical strength, and improve flow properties makes it invaluable. NINGBO INNO PHARMCHEM CO.,LTD is committed to providing high-quality fumed silica that meets stringent purity standards, coupled with clear guidance on safe handling and application, ensuring our clients can harness its benefits effectively and responsibly.