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HS-PEG-COOH, or thiol-terminated polyethylene glycol carboxylic acid, is a versatile, bifunctional, and water-soluble polymer with a thiol (HS-) group at one end and a carboxylic acid (-COOH) group at the other. This unique chemical structure enables a wide range of conjugation strategies, facilitating tailored modifications in bioconjugate synthesis, drug delivery, and biomaterial development.

HS-PEG-COOH polymer’s ability to improve solubility, stability, and biocompatibility of drug molecules makes it an essential component in advanced drug delivery systems, including targeted therapies and controlled-release formulations.


Cat# Name Structure M.W. Purity Pricing
AP14357HS-PEG-COOH, MW 1K1000≥95% Pricing
AP14358HS-PEG-COOH, MW 2K2000≥95% Pricing
AP14359HS-PEG-COOH, MW 3.5K3500≥95% Pricing
AP14360HS-PEG-COOH, MW 5K5000≥95% Pricing

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