For Type C silica gel, its appearance is milky particle or like ground glass，classified as two categories, i.e. spherical item and granular(lumpy) item，this product is mainly used as purificant and desiccant for gas, as acid scavenger for insulating oil, etc, can also be used as catalyst and carrier, desiccant, purificant for gas and liquid, pet padding, can also be used as the raw material for the column chromatography used for the purification of herb and the separation of effective ingredients.