4arm-PEG5K-TK-COOH

Keto mercaptan is a reactive group of ROS.Keto mercaptan polymers are widely used in inflammation and tumor.Inflammation and tumor have high levels of ROS, which can break keto mercaptan chemical bond and realize drug release. Polyethylene glycol(PEG)is a kind of high molecular polymer,which has no irritation,slightly bitter taste,good water solubility and good compatibility with many organic components.

msds---4arm-PEG5K-TK-COOH