Information about silica gel at best price

 Silica gel, along with micro- or nanoporous silica, is a diverse organization of silica gel materials at the best price. It is produced in the bureaucratic sector and is used, among other things, as a desiccant, silica gel singapore distributor a cleaning medium and a catalyst carrier. Silica gel usually occurs as a hard, crumbly solid, but its highly hydrated form can be softer and more gel-like. They also come in a variety of shapes, including irregular shapes and round beads.

Natural silica gel is colorless, but many silica gel products contain pigments and dyes that change hue with hydration and sudden pH changes. Silica gel has a high specific surface area (approximately 800m2/g) and absorbs moisture easily, making it useful as a desiccant. After the gel is saturated with water, at 120 ° C he can be regenerated by heating for 1-2 hours. As with molecular sieves, overheating the beads can cause them to crack.

Certain forms of silica gel "burst" when exposed to enough water, causing the spheres to collapse. A key characteristic of many anhydrous silica gels is that they tend to release large amounts of heat upon adsorption of water and other substances. This is a relatively reliable method for measuring the dryness of silica used to dry or remove water from solvents.

Chemically, silica gel beads, like other types of silica, are very inert, but react with concentrated alkalis, hot concentrated phosphoric acid, hydrofluoric acid, and some fluorine compounds. However, they can absorb water and turn into soft silica gel, which can be observed in many products, from clothing, shoes, all packaging, furniture, electronic and mechanical devices to small classified interior luggage. increase.

Silica gel has many uses in the laboratory. Many commercial variants containing silica in small packages of consumer products are used as desiccants because they can absorb moisture from the air. You can easily check the presence or absence of water by displaying species, including those found in cat mud. Although not currently widely available commercially for beginners, chromatography-grade silica is one of the most common grades of HIS chromatography columns. read more

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