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<h3>Overview</h3>
<p><strong>1(2H)-Phthalazinone</strong> (CAS 119-39-1, C8H6N2O) is a heterocyclic intermediate synthesized via condensation of phthalic anhydride with hydrazine hydrate. It serves as a critical scaffold in pharmaceutical manufacturing.</p>
<h3>Application</h3>
<ul>
<li>Synthesis of anticoagulant drugs and cardiovascular agents.</li>
<li>Production of fungicides and agrochemicals.</li>
<li>Intermediate for fluorescent probes and dyes.</li>
</ul>
<h3>Precautions</h3>
<p>Store in a cool, dry place away from oxidizers. Use appropriate PPE to avoid skin contact and inhalation; do not ingest. Regulatory approval required for clinical use.</p>