Used primarily as a diazo compound in organic synthesis, it serves as a key reagent for homologation reactions, enabling the extension of carbon chains. It is especially valuable in the preparation of cyclopropanes through cyclopropanation reactions with alkenes, often catalyzed by transition metals like rhodium or copper. Its ability to generate carbenes under mild conditions makes it useful in constructing complex ring systems found in pharmaceuticals and natural products. Additionally, it participates in X–H insertion reactions (where X = C, O, N) to form new carbon–heteroatom bonds, which are crucial in drug development and functional molecule design. Due to its reactivity, it is handled with care in controlled environments for safe and efficient transformations.