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<h3>Overview</h3>
<p><strong>4-Nitrophthalonitrile</strong> (CAS <strong>31643-49-9</strong>, C8H2N4O2) is a key organic intermediate synthesized via nitration of phthalonitrile. It serves as a critical precursor for high-performance dyes and pharmaceuticals.</p>
<h3>Application</h3>
<ul>
<li>Synthesis of azo dyes for textile coloring.</li>
<li>Production of pharmaceutical intermediates including antibiotics.</li>
<li>Manufacturing of advanced optical materials.</li>
</ul>
<h3>Precautions</h3>
<p>Store in a cool, dry, ventilated area away from oxidizers. Use appropriate PPE to prevent skin contact and inhalation due to potential toxicity.</p>