ɪz jˈuːzd ɪn kˌɑːmbᵻnˈeɪʃən wɪð ˌeɪtʃˈɛf æz ɐ kˈæɾɐlˌɪst fɚðɪ ˌælkɪlˈeɪʃən ʌv ˈælkeɪnz ænd ˈælkiːnz ænd fɚðə pɹˌoʊtənˈeɪʃən ʌv ɚɹoʊmˈæɾɪk kˈɑːmpaʊndz.
is used in combination with HF as a catalyst for the alkylation of alkanes and alkenes and for the protonation of aromatic compounds.