Phosphate PEG

Phosphate PEG is a surface-active PEG derivative that can be used to modify metal oxide surfaces such as titanium dioxide, alumina and iron oxide. Phosphate groups have a high binding affinity for metal oxide surfaces. Phosphoric acid PEG can form self-assembled monolayers (SAM) on these surfaces. On the other hand, the PEG chains prevent non-specific uptake of proteins by the modified surfaces, which is an important requirement for implantable devices. In addition to functional phosphoric acid PEG products, BOC Sciences also provides PEG products with other functional groups or bio-ligands, such as biotin PEG and fluorescent PEG.

Methoxy Phosphate PEG

Examples of Phosphate PEG


mPEG-Phosphate is used to form stable monolayers of protection on PEG metal oxide particles and surfaces, where strong binding properties of organophosphorus molecules to metal oxides are generated through phosphate-metal coordination interactions, producing stable M-O-P structures. The phosphate coupling agent forms a self-assembled monolayer on the surface of the metal oxide nanoparticles to form a thermodynamically stable dispersion.

Methoxy PEG Phosphate

Methoxy PEG Phosphate is a monofunctional polyethylene glycol phosphate derivative that can be used to modify metal oxide surfaces. By combining biomolecules or biological reactants with Methoxy PEG Phosphate, sensitive and selective biosensors can be constructed for detecting biomarkers, analyzing biological reactions, etc.

Phosphoric Acid Compounds used to Prepare Phosphate PEG

  • Phosphoryl chloride
  • Sodium dihydrogen phosphate
  • Sodium phosphate tribasic
  • Tributyl phosphate
  • Dimethyl hydrogen phosphate
  • Diethyl hydrogen phosphate
  • Diisopropyl hydrogen phosphate

How to Prepare High-purity Phosphate PEG?

1. Place a dry reaction vessel in an inert atmosphere and add an appropriate amount of reaction solvent.

2. Add an appropriate amount of methoxy PEG and phosphoric acid compound to the reaction vessel. Usually, a molar ratio of 1:1 can be chosen, but this can be adjusted according to specific needs.

3. A basic catalyst is added to the reaction vessel to promote the phosphorylation reaction.

4. The reactants are mixed and the reaction is carried out at an appropriate temperature. The reaction temperature is usually carried out between room temperature and 60°C, depending on the nature of the reactants and the rate of reaction.

5. After the reaction is complete, the product can be dissolved by adding an appropriate solvent or by dissolving the reaction mixture in a solvent. The products are purified from unreacted feedstocks, by-products and catalysts using appropriate purification techniques such as solvent extraction, precipitation or column chromatography. The purified product is dried to remove residual solvent and water.

Application of Phosphate PEG

Polymer Crosslinking

Phosphate PEG can be used for polymer crosslinking. By mixing polymers with Phosphate PEG, a cross-linking reaction can occur for the preparation of hydrogel materials and scaffold materials.

Surface Modification

Phosphate PEG can be used for surface modification of biomaterials, typically through carboxyl, amino or sulfur reactions. The surface modification of biomaterials can change their properties such as water solubility, biocompatibility and cell adhesion.

Microfluidic Chip Preparation

Phosphate PEG can be combined with other materials to form microfluidic chips, which can be prepared by soft lithography, thermoforming, or 3D printing.

BOC Sciences offers high-quality Phosphate PEG products based on expertise and experience, and provides technical support for these products. If you are interested in our products, please feel free to contact us.

Why BOC Sciences?

  • Large Stock

    More than 2000+ products in inventory

  • Global Delivery

    Warehouses in multiple cities to ensure fast delivery

  • mg to kg

    Multi specification for academic research and industrial production

  • 24/7 Technical Support

    Strict process parameter control to ensure product quality



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BOC Sciences supplies a unique variety of PEG derivatives and functional PEG polymers. Our products offer the most diverse collection of reactivity, ready-to-use functionality, and molecular weight options that you will not find anywhere else.

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