Color-changing silica gel possesses the adsorption and moisture-proofing functions of fine-pore silica gel. Its characteristic is that during the moisture absorption process, it gradually turns light blue as the moisture absorption increases, and eventually becomes light red or light pink. It can both indicate the environmental humidity and visually show whether the desiccant needs to be replaced.

Color-changing silica gel is widely used for moisture-proof packaging in transformers, electrical cabinets, precision instruments, leather, clothing, and household appliances. It can be used alone as a desiccant or in combination with fine-pore silica gel.