Linear monofunctional PEG derivatives have a reactive group at one end of the PEG and the other end is capped with a methoxy group or a sugar group.
where X is the functional group or active group and CAP can be either a methoxy group or a sugar molecule.
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<h3>Overview</h3>
<p>Linear monofunctional PEG derivatives are polyethylene glycol chains terminated with a single reactive group. Synthesized via ring-opening polymerization of ethylene oxide followed by end-capping, these compounds feature the general formula <strong>H-(OCH2CH2)n-X</strong>. Common variants include methoxy-PEG-OH (CAS 25930-18-7) and amino-PEG-COOH (CAS 65174-39-2), serving as critical intermediates for bioconjugation.</p>
<h3>Application</h3>
<ul>
<li><strong>Pharmaceuticals:</strong> Enhancing protein half-life via PEGylation.</li>
<li><strong>Diagnostics:</strong> Labeling antibodies and nucleic acids.</li>
<li><strong>Materials Science:</strong> Modifying surface properties of polymers.</li>
<li><strong>Drug Delivery:</strong> Constructing micelles and nanoparticles.</li>
</ul>
<h3>Precautions</h3>
<p>Store in sealed containers at <strong>-20°C</strong> to prevent hydrolysis. Avoid inhalation of dust; use appropriate PPE. Clinical applications require strict purity verification to minimize immunogenicity risks.</p>