DL-2,4-Diaminobutyric acid dihydrochloride is primarily used in biochemical research as a precursor or intermediate in the synthesis of various peptides and amino acid derivatives. It plays a role in studying metabolic pathways, particularly those involving amino acid metabolism and transport. This compound is also utilized in the development of pharmaceutical agents, where it serves as a building block for designing drugs targeting neurological disorders or other conditions related to amino acid imbalances. Additionally, it finds application in the production of specialized reagents for laboratory experiments, aiding in the investigation of protein structure and function.