Title: Silicic Acid

CAS Registry Number: 1343-98-2

Additional Names: Precipitated silica

Literature References: Approx H2SiO3. Occurs in nature as opal. Monograph: E. A. Hauser, Silicic Science (Van Nostrand, Princeton, 1958). Short review of chemistry: S. A. Greenberg, J. Chem. Educ. 36, 218-219 (1959).

Properties: White, amorphous powder. Insol in water or acids except hydrofluoric (see under Silicon Dioxide); sol in hot fixed alk hydroxide solns.

 

Derivative Type: Silica gel

Properties: Pptd silicic acid in form of lustrous granules, esp prepd and adapted for absorption of various vapors.