Blue Silica Gel is a synthetic, amorphous form of silicon dioxide infused with cobalt chloride, an indicator that changes color as it absorbs moisture. In its dry state, the beads or crystals are deep blue. As they pick up moisture, they gradually turn light pink, signaling that the gel is saturated and needs replacement or regeneration.
This self-indicating desiccant can absorb up to 40% of its weight in water vapor. The color change typically begins when the gel has absorbed around 8% of its weight in moisture, making it an ideal visual indicator for humidity control in sealed containers.
Blue Silica Gel is available in bead form—commonly used in small pouches and industrial applications for air and gas drying—and crystal form, often used in transformer breathers.
Silchem Pharmaceuticals manufactures and supplies high-quality Blue Silica Gel beads and crystals, ensuring long-lasting performance, reliable moisture control, and safe use in food and pharmaceutical packaging without harmful effects.