Type A Blue Indicating Silica Gel is a desiccant and used to dry and maintain the humidity of a
contained area. Blue Silica Gel beads are indicating forms of desiccant as they change color when adsorbing moisture. Blue Indicating Silica Gel is covered with a moisture indicating solution, containing cobalt chloride, that
gives them a blue color when dry. The Blue Silica Gel beads become a pink
color as they adsorb moisture which indicates the desiccant needs to be regenerated or replaced.
Silica Gel beads are manufactured by using sodium silicate to create a porous form of silicon dioxide (SiO2). It consists of 97% silica and 3% alumina with a highly porous surface and a lust for absorbing water.
While used to reduce moisture in packages when stored, our bulk Silica Gel desiccant is typically used to dry compressed air and gas. Dew points of -40°F can be achieved with Silica Gel beads when using a compressed air dryer or gas dryer. Silica Gel can also be used as a catalyst carrier, separator, variable-pressure adsorbents, and other purposes.
As Silica Gel fractures in the presence of liquid water, it is typically protected by a 10% to 15% (by weight) layer of Activated Alumina desiccant as a water buffer on the inlet side of the desiccant bed.
||3.0 - 5.0 mm
|Qualified Ratio of Particle Size
||≤ 3.0% mm
||≥ 46.5 lbs/cu. ft.
|Adsorption Capacity (RH = 20%)
|Adsorption Capacity (RH = 35%)
|Adsorption Capacity (RH = 50%)
||≥ 1500 Ω.cm
||4.0 - 8.0
|Loss on Ignition
||≤ 2.0% of weight
|Qualified Size Ratio
Blue Indicating Silica Gel should not be used in contact with products intended for consumption such as food or pharmaceuticals. It contains cobalt chloride which is toxic and should be disposed of properly.