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<h3>Overview</h3>
<p>Ethyl 3-amino-4-pyrazolecarboxylate is a key heterocyclic intermediate synthesized via <strong>cyclization of ethyl hydrazineacetate</strong>. Its molecular formula is C6H9N3O2 with CAS No. 1007-58-5, serving as a foundational building block for pharmaceutical synthesis.</p>
<h3>Application</h3>
<ul>
<li><strong>Pharmaceuticals:</strong> Precursor for pyrazolone-based NSAIDs and antipyretics.</li>
<li><strong>Agricultural Chemicals:</strong> Synthesis of fungicides and herbicide active ingredients.</li>
<li><strong>Dyes & Pigments:</strong> Production of azo dyes requiring pyrazole scaffolds.</li>
</ul>
<h3>Precautions</h3>
<p>Store in a cool, dry place under inert atmosphere to prevent oxidation. Use appropriate PPE including gloves and eye protection; avoid inhalation of dust or vapors during handling.</p>