tɹˌaɪθɪləksˈoʊniəm tˈɛtɹɐflˌʊɹɹəbɚɹˌeɪt ɪz ɐ vˈɛɹi stɹˈɔŋ ˈælkɪlˌeɪɾɪŋ ˈeɪdʒənt, ɔːlðˈoʊ ðə hˈæzɚdz ɑːɹ dᵻmˈɪnɪʃt bɪkˈʌz ɪɾ ɪz nˈɑːnvˈɑːlɐɾəl.
Triethyloxonium tetrafluoroborate is a very strong alkylating agent, although the hazards are diminished because it is non-volatile.