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Propargyl Chloride (CAS No. 624-65-7) is a colorless to light yellow liquid with a pungent odor and the chemical formula C₃H₃Cl. It is an important organic intermediate characterized by its highly reactive alkyne (triple bond) and allyl chloride functional groups. This dual reactivity makes it a valuable building block in both industrial and research settings.

One of the primary applications of Propargyl Chloride is in the pharmaceutical industry, where it is used to synthesize a variety of bioactive molecules, intermediates, and active pharmaceutical ingredients (APIs). Its unique structure allows it to participate in a wide range of chemical reactions, including nucleophilic substitution and coupling reactions, making it an essential reagent in medicinal chemistry.

In the field of agrochemicals, Propargyl Chloride serves as a precursor for herbicides and pesticides. It is used to introduce propargyl functionality into molecules, enhancing their biological activity and stability.

Additionally, it is widely used in organic synthesis and polymer chemistry for the preparation of specialty monomers, crosslinkers, and modified resins. Its ability to undergo “click” reactions with azides also makes it useful in materials science, particularly in the design of functional polymers and surface modification technologies.

Due to its reactivity and volatility, Propargyl Chloride must be handled with care, under appropriate safety conditions, including proper ventilation and protective equipment. It is typically stored in cool, dry environments away from moisture and strong bases.

In summary, Propargyl Chloride is a versatile and reactive compound with broad applications in pharmaceuticals, agrochemicals, and advanced materials, making it a vital chemical in modern synthesis and research.