*The following content is generated by AI and is for reference only.
<h3>Overview</h3>
<p>L-Homocysteine-d4 is a stable isotopically labeled internal standard for quantitative analysis. It features deuterium substitution at four positions to ensure distinct mass spectrometry detection. The molecular formula is <strong>C5H10D4NO2S</strong> and CAS number is <strong>196777-86-5</strong>. Core synthesis involves catalytic deuteration of L-homocysteine.</p>
<h3>Application</h3>
<ul>
<li><strong>Metabolomics:</strong> Quantification of homocysteine levels in plasma and urine samples.</li>
<li><strong>Pharmacokinetics:</strong> Tracing drug metabolism pathways in clinical trials.</li>
<li><strong>Quality Control:</strong> Validation of analytical methods in pharmaceutical manufacturing.</li>
</ul>
<h3>Precautions</h3>
<p>Store under inert atmosphere at -20°C to prevent degradation. Handle with appropriate PPE as it may cause skin irritation. Not intended for direct human therapeutic use; strictly for laboratory research applications only.</p>