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单词 dithionic acid
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dithionic acid
In dithionic acid, a synonym of hyposulphuric acid, H2S2O6, a dibasic acid not isolated in the pure state, but forming crystallizable salts, called dithionates n. /daɪˈθaɪənət/
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1854 J. Scoffern in Orr's Circle Sci. Chem. 285 Hyposulphuric acid (Dithionic acid).
1868 H. Watts Dict. Chem. V. 637 Dithionic Acid, when concentrated as highly as possible, is an inodorous, strongly acid, hydrated liquid, of specific gravity 1·347; on attempting to concentrate it further, it resolved into sulphuric acid and sulphurous oxide..The dithionates are permanent at ordinary temperatures.
1883 J. T. Taylor Hardwich's Man. Photogr. Chem. (ed. 9) 97 All the acids being unstable with the exception of the Dithionic.
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