United Kingdom
Sodium Metasilicate is an ionic compound consisting of sodium cations Na+ and the polymeric metasilicate anions [–SiO2−3–]n. It is a colorless crystalline hygroscopic and deliquescent solid, soluble in water. The anhydrous compound can be prepared by fusing silicon dioxide SiO2 (silica, quartz) with sodium oxide Na2O in 1:1 molar ratio. In addition to the anhydrous form, there are hydrates with the formula Na2SiO3·nH2O (where n = 5, 6, 8, 9)
Molar Weight | 122.06 g/mol |
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Melting Point | 48°C (nonahydrate), 72°C (pentahydrate) |
Density | 2.61 g/cm³ |
Forms | Crystals, White |
Synonyms: Disodium metasilicate, disodium oxosilanebis(olate)
Chemical Formula: Na2O3Si
CAS Number: 6834-92-0, 13517-24-3 (Nonahydrate), 10213-79-3 (Pentahydrate)