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<h3>Overview</h3>
<p><strong>Progesterone-d9</strong> is a stable isotopically labeled internal standard used in mass spectrometry. Synthesized via deuterium exchange or catalytic deuteration, it features the molecular formula C21H27D9O2 and CAS No. 14865-17-5.</p>
<h3>Application</h3>
<ul>
<li>Pharmaceutical analysis for quantifying progesterone levels in biological fluids.</li>
<li>Quality control in endocrine drug manufacturing processes.</li>
<li>Metabolic studies to trace steroid hormone pathways in clinical research.</li>
</ul>
<h3>Precautions</h3>
<p>Store under inert atmosphere at -20°C. Handle with appropriate PPE to prevent inhalation or skin contact; not intended for direct clinical administration.</p>