Used primarily as a chemical intermediate in organic synthesis, especially in the production of antioxidants like butylated hydroxytoluene (BHT). It serves as an alkylating agent in the manufacture of flavors, fragrances, and pharmaceuticals. Also employed in research laboratories for studying reaction mechanisms involving alkenes, such as electrophilic addition and ozonolysis. Its high reactivity makes it suitable for polymerization studies and as a reagent in the synthesis of tert-amyl methyl ether (TAME), a gasoline additive.