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Sodium metasilicate
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<p>Sodium metasilicate is the <a href="/facts/Chemical_compound/37FXqqtv">chemical substance</a> with formula Na2SiO3, which is the main component of commercial <a href="/facts/Sodium_silicate/055T0IYW">sodium silicate</a> solutions. It is an <a href="/facts/Salt_(chemistry)/lsSKwGpn">ionic compound</a> consisting of <a href="/facts/Sodium/eYuSPu2V">sodium</a> <a href="/facts/Cation/wrbwhF3z">cations</a> Na+ and the <a href="/facts/Polymer/eF32E50K">polymeric</a> <a href="/facts/Metasilicate/Fl99N3R4">metasilicate</a> <a href="/facts/Anion/wrbwhF3z">anions</a> [–SiO2−3–]<i>n</i>. It is a colorless crystalline <a href="/facts/Hygroscopy/1NBGewXv">hygroscopic</a> and <a href="/facts/Deliquescence/1NBGewXv">deliquescent</a> solid, soluble in water (giving an alkaline solution) but not in alcohols. </p>