Sodium silicate is a generic name for chemical compounds with the formula Na ₂ₓSiO ₂₊ₓ or ₓ·SiO ₂, such as sodium metasilicate Na ₂SiO ₃, sodium orthosilicate Na ₄SiO ₄, and sodium pyrosilicate Na ₆Si ₂O ₇. The anions are often polymeric.
Molecular Formula: Na2SiO3