CHEMICAL FORMULA SiO2 · nH2O + CoCl2
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.
|Granular Size||1.5 – 3.0||mm|
|Nominal Pore Opening||20 – 30||Angstroms|
|Color Change||Blue to Pink||Indication|
|Water Adsorption Capacity|
|20%||≥ 11||% Weight|
|40%||≥ 22||% Weight|
|80%||≥ 33||% Weight|
|Bulk Density||≥ 780||g/l|
|Size Qualification||≥ 97||%|
|Package Moisture||≤ 1.5||% Weight|
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.
HANDLING & STORAGE RECOMMENDATIONS
Outline in our Current Safety Data Sheet – Click Here