*The following content is generated by AI and is for reference only.
<h3>Overview</h3>
<p><strong>Rac-Cotinine-d3</strong> is a stable isotope-labeled internal standard used in quantitative mass spectrometry. Synthesized via deuterium exchange or isotopic synthesis, its molecular formula is C10H12D3N2O and CAS number is 1094765-87-3.</p>
<h3>Application</h3>
<ul>
<li>Pharmaceutical analysis for nicotine metabolism studies.</li>
<li>Forensic toxicology to quantify cotinine levels in biological fluids.</li>
<li>Clinical trials validating biomarkers for tobacco exposure.</li>
</ul>
<h3>Precautions</h3>
<p>Store at -20°C in sealed containers under inert atmosphere. Handle with appropriate PPE to avoid inhalation or skin contact; not for direct human administration.</p>