... , in addition to hydrofluoric acid (HF) and strong base, but does not react with any substance.(2) thermal stability, pore type silica gel ... -600 °C long-term use under high temperature conditions.(3) silica gel has a rigid frame structure, high mechanical strength, good wear ... and non-soluble in water features, even full of water absorption, the look and feel, or dry.(5) silica gel with stable quality ...