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<h3>Overview</h3>
<p><strong>Rac Mono(2-ethyl-5-oxohexyl) Phthalate-d4</strong> is a deuterated internal standard for LC-MS/MS analysis, synthesized via esterification of phthalic acid with <strong>d4-labeled 2-ethyl-5-oxohexanol</strong>. Its molecular formula is C13H13DO6 and CAS No. is unassigned.</p>
<h3>Application</h3>
<ul>
<li>Quantitative pharmacokinetic studies in drug metabolism research.</li>
<li>Calibration standards for high-sensitivity mass spectrometry assays.</li>
<li>Method validation for monitoring phthalate metabolites in biological matrices.</li>
</ul>
<h3>Precautions</h3>
<p>Store under inert atmosphere at -20°C to prevent hydrolysis. Use only in certified laboratories; not intended for direct clinical administration or human exposure.</p>