Blue Silica Gel

About Blue Silica Gel

Blue silica gel is an indicating desiccant made from amorphous silicon dioxide that has been impregnated with cobalt chloride, resulting in a characteristic deep blue color when dry. When it absorbs moisture, the beads slowly change from blue to pink to give a good and easy-to-see indication that the silica gel is saturated and must be replaced or regenerated. This visual characteristic of blue silica gel makes it particularly valuable in use cases where the watching of moisture contents is imperative, including in electronics protection, machinery, optical instruments, and industrial packaging. The beads have a size of normally 1 to 4 mm and are capable of absorbing as much as 3035% of their weight in water. Although it is effective, blue silica gel has the toxic and incompatible cobalt chloride in it, which is not appropriate for use in pharmaceutical, or other sensitive areas.