Blue Indicating Silica Gel Granular Specs

Blue Indicating Silica Gel Granular

CHEMICAL FORMULA SiO2 · nH2O + CoCl2

PRODUCT DESCRIPTION
DelSORB® SGBIG Blue indicating silica gel is the naturally occurring mineral silicon dioxide that has been purified and processed into a hard, smooth beaded form. The beads are then saturated with a moisture indicating solution that gives them a deep blue color when dry. It is also known as a narrow pore silica gel and has a vast network of interconnecting pores with diameters of 20-30Å. These pores have a strong affinity for moisture and use physical adsorption and capillary condensation to trap and hold it. Silica gel will remove moisture at temperatures as high as 220°F, but is best used at room temperature (70-90°F) and high relative humidity (60-90%Rh). The color changes from blue to purple to pink as it adsorbs moisture.

SPECIFICATIONS

Property

Value

Unit

Granular Size

1.5 - 3.0

Nominal Pore Opening

20 - 30

Angstroms

Color Change

Blue to Pink

Indication

pH(Slurry)

≈ 7

Water Adsorption Capacity

20%

≥ 11

% Weight

40%

≥ 22

% Weight

80%

≥ 33

% Weight

Bulk Density

≥ 780

g/l

≥ 48

lbs/ft3

Size Qualification

≥ 97

Package Moisture

≤ 1.5

% Weight

TYPICAL APPLICATIONS
As a primary desiccant or blended with other desiccants in any application where visual control of moisture is required, such as compressed air dryers, gas drying, breathers, for protection of non-consumable packaged goods, drying and storage of flowers and seeds, etc. Due to the addition of the moisture indicator, DelSORB® AB25B Indicating Silica Gel should not be used in contact with products intended for consumption such as food or pharmaceuticals.

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