In the biopharmaceutical field, PEGylation technology continues to attract significant industry attention as a key means of improving drug performance. Sinopeg has deep expertise in the PEG derivative sector and is committed to providing pharmaceutical companies and research institutions with products and technical support covering a wide range of application scenarios.

Diverse Product Lines

Sinopeg offers a broad variety of PEG derivatives in terms of structural types, with a product matrix encompassing both linear and specialized structures:

• Linear PEG Derivatives:Including mono-functionalized, di-functionalized, and hetero-bifunctionalized types, catering to different coupling directions and connection modes. These are suitable for classic applications such as protein modification and surface functionalization.

• Specialized Structure PEG Derivatives:Featuring multi-arm (2-arm, 3-arm, 4-arm, 6-arm, 8-arm), V-shaped, Y-shaped, and other topological structures, providing structural support for cutting-edge scenarios including hydrogel construction, targeted delivery, and multivalent conjugation.

Sinopeg also has the capability to produce monodisperse PEG derivatives, offering a series of products ranging from low to high molecular weights. This diverse combination of structures and specifications facilitates flexible selection based on customer requirements.

Rich Functional Group Offerings

The application value of PEG derivatives depends significantly on the types of functional groups at their terminal ends—these groups act as "molecular handles" that enable selective conjugation with specific groups on drug molecules, proteins, antibodies, or nanoparticle surfaces. Sinopeg provides a comprehensive selection of functional groups covering mainstream conjugation chemistries:

• Classic Conjugation Functional Groups:Including amino (-NH₂), carboxyl (-COOH), aldehyde (-CHO), thiol (-SH), acrylate (AA), methacrylate (MA), etc., covering a variety of classic conjugation strategies and material preparation needs.

• Amino-Reactive Functional Groups:Including succinimidyl esters (e.g., SC, SCM, SS, SVA), nitrophenyl carbonate (NPC), etc., which efficiently couple with primary amino groups under mild conditions and are commonly used tools for protein, peptide, and antibody modification.

• Thiol-Reactive Functional Groups:Such as maleimide (MAL) and vinyl sulfone (VS), which selectively conjugate with thiol-containing biomolecules and are suitable for modification scenarios such as antibody-drug conjugates (ADCs).

• Click Chemistry Functional Groups:Such as azide (N₃) and alkyne (Alkyne), enabling efficient, highly selective bioorthogonal conjugation under mild conditions via click chemistry, widely applied in mRNA delivery, nanomaterial modification, and other fields.

More importantly, within the same product line, different functional group versions can be matched with corresponding PEG structures (linear, multi-arm, Y-shaped, etc.), forming a "structure × functional group" three-dimensional product matrix. This offers customers flexible molecular design space and adaptability to diverse needs ranging from long-acting drug modification to complex delivery system construction.

Quality Assurance

Through proprietary modification technologies, initiation systems, and systematic extraction methods, Sinopeg achieves a substitution rate of approximately 99% for its polydisperse PEG derivatives. Meanwhile, leveraging refined polymerization processes, the molecular weight dispersity is controlled to within 1.05. The combination of high substitution rate and narrow distribution enhances batch-to-batch consistency, providing more reliable support for stoichiometric control in customer conjugation reactions.

Additionally, Sinopeg's monodisperse PEG derivative products feature high purity and stable quality, with homolog impurities ≤0.2% and single impurity ≤1%, meeting the rigorous impurity profile requirements of demanding application scenarios.

Supporting Cutting-Edge R&D

Sinopeg's PEG derivative products are applied in frontier areas including mRNA vaccine delivery systems, ADC drugs, ProTAC technology, and small nucleic acid therapeutics, serving as important components in platforms such as lipid nanoparticles, antibody conjugation, and proteolysis-targeting chimeras. The company also offers integrated CDMO services from preclinical research to commercial production, helping customers accelerate project timelines.

Leveraging sustained technical accumulation and a robust quality control system, Sinopeg is dedicated to providing the biopharmaceutical industry with high-performance, stable PEG derivative products and contributing to the continued advancement of drug delivery technologies.

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