Butyl dichloromethyl ether is primarily used in organic synthesis as a reagent for introducing the dichloromethyl group into various compounds. It is particularly valuable in the preparation of intermediates for pharmaceuticals and agrochemicals, where the dichloromethyl moiety can serve as a precursor for further functionalization. Additionally, it finds application in the production of specialty chemicals, including dyes and polymers, where its reactivity enables the creation of complex molecular structures. Due to its potential hazards, it is handled with strict safety protocols in industrial and laboratory settings.