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<h3>Overview</h3>
<p><strong>4-Chloro-isatoic anhydride</strong> (CAS 1029-58-7, Formula C8H4ClNO3) is a key heterocyclic intermediate synthesized via chlorination of isatoic anhydride. It serves as a vital building block in pharmaceutical and agrochemical manufacturing.</p>
<h3>Application</h3>
<ul>
<li>Production of benzimidazole derivatives for anti-ulcer drugs.</li>
<li>Synthesis of carbamate pesticides acting as insecticides.</li>
<li>Manufacture of specialized dyes and fluorescent markers.</li>
</ul>
<h3>Precautions</h3>
<p>Store in cool, dry conditions away from moisture. Use appropriate PPE to prevent inhalation or skin contact due to potential irritancy.</p>