Overview
PEGylated Chloride (OH-PEG-Cl) is a versatile chemical compound featuring a polyethylene glycol (PEG) backbone terminated with a hydroxyl group and a reactive chloride group. It is widely utilized in pharmaceuticals, bioconjugation, and material science due to its biocompatibility and tunable properties. The PEG chain length can be customized, influencing solubility, reactivity, and application suitability. This compound is particularly valuable in drug delivery systems, where PEGylation improves pharmacokinetics by reducing immunogenicity and extending circulation time. Its reactive chloride group enables covalent bonding with amines, alcohols, or other nucleophiles, making it a key intermediate in bioconjugation and surface modification.
Physical and Chemical Properties
OH-PEG-Cl exhibits variable physical states depending on the PEG chain length, ranging from viscous liquids (short chains) to waxy solids (long chains). It is highly soluble in water and polar solvents, owing to the hydrophilic PEG backbone. The chloride group enhances reactivity, allowing for efficient conjugation with biomolecules or surfaces. The compound's stability is influenced by storage conditions, as moisture can hydrolyze the chloride group. Its melting point and viscosity are chain-length-dependent, with longer PEG chains offering higher melting points and greater viscosity. PEGylated Chloride is non-toxic and biocompatible, aligning with FDA approvals for PEG-based excipients in pharmaceuticals.
Main Applications
OH-PEG-Cl is primarily used in drug delivery systems, where PEGylation masks therapeutic agents from immune detection, prolonging their half-life in vivo. It is also employed in bioconjugation to link drugs, peptides, or antibodies to PEG chains, enhancing solubility and stability. In material science, this compound serves as a surface modifier for nanoparticles or medical devices, improving biocompatibility and reducing fouling. Additionally, it acts as an intermediate in synthesizing PEG-based hydrogels, coatings, and other functional materials. Its applications extend to diagnostics, where PEGylated probes improve target binding and signal-to-noise ratios.
Safety and Storage
While OH-PEG-Cl is generally low in toxicity, proper handling is essential to avoid skin, eye, or respiratory irritation. Use personal protective equipment (PPE) such as gloves and goggles when working with the compound. Ensure adequate ventilation to minimize inhalation risks. Store the material in a tightly sealed container under cool, dry conditions, away from moisture and direct sunlight. Prolonged exposure to humidity can degrade the chloride functionality. Shelf life typically ranges from 6 months to 2 years, depending on storage conditions and formulation purity.
B2B Procurement Guide
When procuring OH-PEG-Cl, specify the PEG chain length (e.g., PEG-300, PEG-1000) and purity grade (e.g., >95%, pharmaceutical grade). Suppliers often provide custom synthesis services to tailor molecular weight and end-group functionality. Compare vendors based on batch consistency, technical support, and regulatory compliance (e.g., USP, EP standards). Bulk purchases (e.g., >10 kg) may qualify for discounts. Request certificates of analysis (CoA) to verify purity and functionality. For pharmaceutical applications, ensure the supplier meets GMP requirements and provides documentation for regulatory submissions.
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