Used as a key intermediate in the synthesis of betaine derivatives, this compound serves in pharmaceutical and biochemical applications where zwitterionic structures are required to enhance solubility and stability of active ingredients. Its alkyne functionality allows for use in click chemistry reactions, particularly in bioconjugation and labeling processes for drug development and molecular probes. Due to the sulfonate group and quaternary ammonium center, it is also employed in the formulation of biocompatible surfactants and ionic liquids with low toxicity and high biodegradability. Additionally, it finds use in research settings for modifying peptides and proteins, enabling site-specific attachments for diagnostic or therapeutic purposes.