Cbz-N-amido-tri-(carboxyethoxymethyl)-methane is a aqueous soluble PEG linker with an Cbz group with three terminal carboxylic acids. The Cbz protecting group can be removed under acidic conditions. The terminal carboxylic acids can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) to form a stable amide bond. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.