Widely used as a reducing agent in biochemistry and molecular biology, particularly for breaking disulfide bonds in proteins. It is commonly applied in sample preparation for SDS-PAGE to ensure complete reduction of cystine bonds, improving protein separation. Preferred over thiol-based reductants like β-mercaptoethanol due to its lack of odor, higher stability, and effectiveness at neutral pH. Also used in peptide synthesis, protein folding studies, and surface chemistry for modifying gold nanoparticles. Its water solubility and compatibility with various functional groups make it suitable for biological assays and purification processes.