KHSO4

\kˌe͡ɪˌe͡ɪt͡ʃˌɛsˈə͡ʊ fˈɔː], \kˌe‍ɪˌe‍ɪt‍ʃˌɛsˈə‍ʊ fˈɔː], \k_ˌeɪ_ˌeɪ_tʃ_ˌɛ_s_ˈəʊ f_ˈɔː]\
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1920 - A practical medical dictionary.
By Stedman, Thomas Lathrop