Factory price wholesale Silica gel orange/blue color changing silica ge; desiccant 500GR

  a stable chemical property and never reacts with any substance except the alkali and hydrofluoric acid. Because of chemical composition and physical structure of silicagel, it possesses many advantages as desiccant.For example, high absorption capacity and non-shape changing. It is a non-toxic, odorless and green environmental material. when the blue silica gel absorb moisture,its color will turn into pink,which shows that the silica gel is working.So the blue silica gel is always mixed use with the genenal silica gel.