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<h3>Overview</h3>
<p>Mono-2-ethyl-5-carboxypentyl Terephthalate-d4 is a deuterated internal standard for HPLC and GC-MS analysis. The molecular formula is C18H17DO4 with CAS 1609-53-6.</p>
<h3>Application</h3>
<ul>
<li><strong>Pharmaceuticals</strong>: Quantification of MECPTP metabolites in ADME studies.</li>
<li><strong>Environmental Testing</strong>: Tracing plasticizer degradation products in water samples.</li>
<li><strong>Quality Control</strong>: Validating synthesis purity in polymer additive manufacturing.</li>
</ul>
<h3>Precautions</h3>
<p>Store under inert atmosphere at -20°C to prevent isotopic exchange. Handle with nitrile gloves in fume hoods due to potential skin irritation and toxicity.</p>