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Silica sulfuric acid
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<p>Silica sulfuric acid (SiO2-OSO3H2, SSA), a <a href="/facts/Solid_acid/ILa9AII5">solid acid</a>, is prepared by soaking <a href="/facts/Silica_gel/qrNxnft5">silica gel</a> with <a href="/facts/Sulfuric_acid/Wom6fymJ">sulfuric acid</a>. SSA is used as a catalyst in different organic synthesis process. Silica sulfuric acid is considered as cheap, nonhazardous and easy to handle <a href="/facts/Solid_acid_catalyst/JkJ7LkT6">solid acid catalyst</a> with high acidity. </p>