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Chlorosulfuric acid
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<p>Chlorosulfuric acid (<a href="/facts/IUPAC/2AV6myCK">IUPAC</a> name: sulfurochloridic acid) is the <a href="/facts/Inorganic_compound/TfFfzxSz">inorganic compound</a> with the formula HSO3Cl. It is also known as chlorosulfonic acid, being the <a href="/facts/Sulfonic_acid/6JHPGnNY">sulfonic acid</a> of <a href="/facts/Chlorine/y27UwYBM">chlorine</a>. It is a distillable, colorless liquid which is <a href="/facts/Hygroscopic/1NBGewXv">hygroscopic</a> and a powerful <a href="/facts/Lachrymatory_agent/SLJoBYEN">lachrymator</a>. Commercial samples usually are pale brown or straw colored. </p><p><a href="/facts/Salt_(chemistry)/lsSKwGpn">Salts</a> and <a href="/facts/Ester/FoUAIIw4">esters</a> of chlorosulfuric acid are known as chlorosulfates. </p>