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Sodium silicate is the common name for compounds with the formula Na2(SiO2)nO. A well-known member of this series is sodium metasilicate, Na2SiO3.
S 2372 (OTTO) Sodium metasilicate, nonahydrate, ≥98% Cas 13517-24-3 - used to prepare honeycomb porous silicon (hp-Si).