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<h3>Overview</h3>
<p><strong>o-Phthalaldehyde (OPA)</strong>, CAS 643-79-8, is a key heterocyclic aldehyde synthesized via ortho-chlorotoluene oxidation. Its molecular formula is C8H6O2.</p>
<h3>Application</h3>
<ul>
<li>High-sensitivity HPLC derivatization for amino acid analysis.</li>
<li>Cross-linking agent in protein chemistry and immunology.</li>
<li>Precursor for synthesizing pharmaceutical intermediates.</li>
</ul>
<h3>Precautions</h3>
<p>Store in airtight containers under inert atmosphere at low temperatures. Strict PPE required due to skin irritation risks; avoid direct contact in clinical settings.</p>