SULPHUR DIOXID
\sˈʌlfə da͡ɪˈɒksɪd], \sˈʌlfə daɪˈɒksɪd], \s_ˈʌ_l_f_ə d_aɪ_ˈɒ_k_s_ɪ_d]\
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Sulphurous oxid, sulphurous anhydrid; a colorless gas, SO2, of suffocating and irritating odor, formed by the combustion of sulphur and by the action of certain metals on sulphuric acid. It may be condensed into a liquid and has also been obtained in the solid form. In the presence of moisture it acts as a powerful bleaching and disinfecting agent.
By Smith Ely Jelliffe
