can't read?
Silica gel is an amorphous and porous form of silicon dioxide (silica), consisting of an irregular tridimensional framework of alternating silicon and oxygen atoms with nanometer-scale voids and pores.
S 1396 (OTTO) Silica gel GF-254 Cas 112926-00-8 - used on glass plates for preparative TLC and on aluminium sheets for analytical TLC.