CHO-CH2-PEG1-CH2-Boc is a specialized linker reagent used in organic synthesis, particularly for peptide synthesis and bioconjugation. The aldehyde (CHO) group at one end enables selective reactions such as reductive amination or oxime formation with amines or hydrazides. The PEG1 (polyethylene glycol) spacer provides enhanced solubility in aqueous and organic solvents, improving handling and purification. The Boc (tert-butoxycarbonyl) group at the other end protects an amine functionality, preventing side reactions during synthesis. This compound is essential in pharmaceutical development for precise molecular assembly and in bioconjugation to link biomolecules while preserving activity. Its versatility supports complex transformations in research and drug discovery.