I. [Product Description]
4-arm-PEG-COOH, Four-arm Polyethylene Glycol Carboxyl, is an important organic intermediate. Its unique four-arm structure endows it with good reactivity and versatility. In the field of chemical synthesis, it can serve as a key building block for the preparation of compounds with specific structures and properties, providing more possibilities for organic synthesis.

II. [Product Details]
【Appearance】 Depending on different molecular weights, it appears as a white/off-white solid or a viscous liquid.
【Stability】 Store it under refrigeration and avoid repeated freeze-thaw cycles.
【Solvent】 Common organic solvents such as chloroform, dichloromethane, and DMSO.
【Molecular Weight】 (PEG): 2000, 3400, 5000. Other molecular weights can be customized.
【Storage Conditions】 Store it in a sealed, dry place at a low temperature below 4℃.
▪ Notes: ▶ To ensure product stability, please open the package for use only after constant-temperature drying!

III. [Application Areas]
1. Used for preparing functional polymer materials, which can improve the solubility and biocompatibility of the materials.
2. In the field of surface modification, it can modify the material surface and endow it with specific chemical properties.
3. As a cross-linking agent, it is used for preparing three-dimensional network structure materials such as hydrogels.
4. Used for the surface coating of nanoparticles to improve the stability and dispersibility of nanoparticles.

Remarks: The products sold by our company are only for scientific research and cannot be used for human experiments or human treatment.

Chongqing Yusi Pharmaceutical Technology Co., Ltd. is based on an integrated business model of independent R & D-production-sales, providing professional scientific research reagents for university scientific research experiments. Compared with similar products on the market, our company's products have obvious price advantages. In addition, we also provide professional product customization services.

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Contact Information:
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