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<h3>Overview</h3>
<p><strong>4-Ethynylaniline</strong> (CAS 100-62-9, C8H7N) is a specialized organic intermediate synthesized via Sonogashira coupling or diazotization of ethynylbenzene. It serves as a critical building block for pharmaceuticals and functional materials.</p>
<h3>Application</h3>
<ul>
<li>Pharmaceutical synthesis: Precursor for kinase inhibitors and antiviral agents.</li>
<li>Materials science: Used in polymerizing high-performance liquid crystals.</li>
<li>Catalysis: Ligand component in transition metal catalyzed cross-coupling reactions.</li>
</ul>
<h3>Precautions</h3>
<p>Store under inert atmosphere at temperatures below 5°C. Avoid contact with strong oxidizers due to explosion risk. Use appropriate PPE including respirators and chemical-resistant gloves during handling.</p>