1. [Product Introduction]
OPSS-DNP-PEG-NHS is a multifunctional organic intermediate with both high-efficiency catalytic activity and precise coupling ability, and is widely used in bioconjugation reaction systems. The o-pyridyl disulfide bond and NHS ester group in its molecular structure make it a key pharmaceutical intermediate for protein modification and polymer material synthesis. It can also achieve dynamic cross-linking through a controllable cleavage mechanism, showing unique value in the development of intelligent materials.

   2. [Product Details]
- **Appearance**: Depending on different molecular weights, it appears as a white/off-white solid or a viscous liquid.
- **Stability**: Store in a refrigerator and avoid repeated freezing and thawing.
- **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 in a sealed, dry condition at a low temperature below 4°C.
- **Note**: ▶ To ensure product stability, please open the package only after constant-temperature drying!

   3. [Application Fields]
1. Site-specific labeling of proteins/antibodies and construction of controllable coupling systems.
2. Surface functional modification of nano-drug-loaded particles.
3. Oriented immobilization technology of biosensor probes.
4. Dynamic cross-linking design of responsive polymer materials.
5. Signal amplification module in the development of in vitro detection kits.

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

Chongqing Yusi Pharmaceutical Technology Co., Ltd. operates under an integrated business model of independent R & D, production, and 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.

If you need other products, please contact us:
- **Landline**: 023-62795528
- **Customer Service Hotline**: 18896157519 丨 QQ: 3354316092
                  19112925095 丨 QQ: 3012135199

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