Silica Gel

Silica gel is a granular, vitreous, porous form of silicon dioxide made synthetically from sodium silicate. It is a naturally occurring mineral that is purified and processed into either granular or beaded form. As a desiccant, it has an average pore size of 2.4 nanometers and has a strong affinity for water molecules.

It is used as a desiccant to control local humidity in order to avoid spoilage or degradation of some goods. Because of its high surface area allows it to absorb water readily, making it useful as a desiccant (drying agent). Once saturated with water, the gel can be regenerated by heating it to 120 °C (250 °F) for two hours.

Semi Transparent Blue Silica Gel

Blue Silica gel is semi-transparent glassy crystals used for moisture absorbent. It appears dark blue in color. It is also known as self Indicating type Silica gel because when it is free from moisture the crystals are dark blue in color. As the crystals absorb the moisture, it turns to light blue gradually & and when they turn to pink, it means it is saturated. Its work and requires replacement or regeneration. In fact, it is mainly used as indicator for the extent of dehumidification and moisture absorption in sealed vessel or at some required places.