Silica CharacteristicsColor: faint yellow.Chemical molecular formula: SiO2.nAl2O3.xH2O.Chemically stable, flame-resisting. Insoluble in any solvent.In comparison with fine-pored silica gel, the adsorption capacity of fine-pored silica alumina gel is quite the same when used at low relative humidity, (e.g., RH=10%, RH=20%), while its adsorption capacity at high humidity is 6-10% higher than that ...