Ethyl 2-hydrazinylnicotinate is primarily used in the synthesis of various pharmaceutical compounds. It serves as a key intermediate in the production of drugs targeting cardiovascular diseases and central nervous system disorders. Its hydrazine moiety makes it valuable for creating hydrazone derivatives, which are often explored for their antimicrobial and anticancer properties. Additionally, it is utilized in organic chemistry research for developing novel heterocyclic compounds, which are essential in drug discovery and development processes. Its role in the preparation of nicotinic acid derivatives further extends its application in medicinal chemistry.