*The following content is generated by AI and is for reference only.
<h3>Overview</h3>
<p><strong>NEpsilon-(1-Carboxyethyl)-L-lysine-d4</strong> is a deuterated isotopologue used as an internal standard in mass spectrometry. It features a stable isotopic label to ensure accurate quantification of the native compound. <strong>Molecular Formula</strong>: C<sub>10</sub>H<sub>18</sub>D<sub>4</sub>N<sub>2</sub>O<sub>3</sub>. <strong>CAS No.</strong>: 159768-64-6 (mixture of diastereomers).</p>
<h3>Application</h3>
<ul>
<li>Pharmaceutical R&D for metabolic pathway tracing.</li>
<li>Quantitative analysis in clinical toxicology screening.</li>
<li>Calibration standards for LC-MS/MS instrumentation validation.</li>
</ul>
<h3>Precautions</h3>
<p>Store at -20°C under inert atmosphere to prevent degradation. Handle with appropriate PPE; avoid direct contact and inhalation of dust particles during weighing procedures.</p>