2'-Deoxyadenosine monohydrate is widely used in molecular biology and biochemistry research as a fundamental component in the synthesis of DNA. It serves as a building block for the enzymatic production of oligonucleotides, which are essential for PCR amplification, sequencing, and gene synthesis. In antiviral and anticancer research, it is utilized to study the mechanisms of nucleoside analogs, which can inhibit viral replication or disrupt cancer cell proliferation. Additionally, it plays a role in the development of diagnostic tools and therapeutic agents, particularly in the context of nucleotide metabolism disorders. Its stability and compatibility with enzymatic systems make it a critical reagent in various laboratory applications.