FAQs - Silica gel
History of Silica gel
Silica gel was patented by chemistry professor Walter A. Patrick, USA in 1919 for use in the adsorption of vapors and gases in gas mask canisters during World War I. During World War II, it was commonly used as a dehydrating agent to protect military and pharmaceutical supplies, among a number of other applications. IIn 1959, silica gel was first recommended for use in museum applications as a buffering agent to control relative humidity (RH) in closed packages.
How does Silica gel work?
Silica gel is a highly porous substance that can absorb utpo 40% of its own weight, that is why it is the highest capacity adsorbent available today. Comprised of internal network of interconnecting microscopic pores, silica gel attracts and holds moisture by adsorption and capillary condensation. Water molecules are adsorbed or desorbed by these micro-capillaries until vapor pressure equilibrium is achieved with the relative humidity of the surrounding air.Silica gel is inert, non-toxic, non-flammable and safe to use to protect foods, medicines, sensitive materials and much more.