White Silica Gel
In silica gel white, the particles are not impregnated with any indicating agent. When moisture-free these beads or crystal appear to be transparent. Upon moisture saturation, they turn milky or hazy white. This is the most commonly used silica gel for commercial purposes and is used in compressed air dryers and to protect vitamins, electronics, pharmaceutical products, etc. from moisture.
Orange Silica Gel
In silica gel orange, the particles are impregnated with an indicating agent called methyl-violet that gives the color orange to it. Once these beads or crystals reach the maximum adsorption capacity, the orange color turns into green. Orange silica gel is non-toxic and eco-friendly. It finds application in compressed air dyers, breathers, non-consumable packages goods.
Blue Silica Gel
In silica gel blue, the particles are impregnated with an indicating agent called cobalt chloride. The cobalt chloride gives these bead/crystals a deep-blue color that upon reaching adsorption capacity changes into pink color.
