Used as a reagent in organic synthesis, particularly for the preparation of terminal alkynes through alkylation reactions. It serves as a protected and stabilized form of lithium acetylide, allowing for controlled acetylene transfer under milder conditions. The ethylenediamine ligand enhances solubility and stability, making it suitable for use in various polar aprotic solvents. Commonly applied in pharmaceutical and fine chemical manufacturing where precise C–C bond formation is required. Also utilized in the synthesis of conjugated enynes and other acetylene-based building blocks in materials science.