SULPHURETTED HYDROGEN

\sˈʌlfjʊɹɪtɪd hˈa͡ɪdɹəd͡ʒən], \sˈʌlfjʊɹɪtɪd hˈa‍ɪdɹəd‍ʒən], \s_ˈʌ_l_f_j_ʊ_ɹ_ɪ_t_ɪ_d h_ˈaɪ_d_ɹ_ə_dʒ_ə_n]\
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1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe