(R)-2-(Aminomethyl)-3-methylbutanoic acid hydrochloride is primarily used in the synthesis of pharmaceuticals, particularly in the development of drugs targeting neurological and cardiovascular conditions. Its chiral structure makes it valuable for creating enantiomerically pure compounds, which are crucial for ensuring the efficacy and safety of medications. The compound is also employed in research as a building block for peptides and other bioactive molecules, aiding in the study of metabolic pathways and receptor interactions. Additionally, it finds application in the production of specialized amino acid derivatives used in nutritional supplements and therapeutic agents.