C
CHEMISTRY; METALLURGY
C
CHEMISTRY; METALLURGY
C01
INORGANIC CHEMISTRY
C01
INORGANIC CHEMISTRY
C01B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF;; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
C01B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF;; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
C01B33/00
Silicon; Compounds thereof
C01B33/00
Silicon; Compounds thereof
C01B33/113
Silicon oxides; Hydrates thereof
C01B33/113
Silicon oxides; Hydrates thereof
C01B33/12
Silica; Hydrates thereof, e.g. lepidoic silicic acid
C01B33/12
Silica; Hydrates thereof, e.g. lepidoic silicic acid