dithionic, a. Chem.
(daɪθaɪˈɒnɪk, dɪθɪˈɒnɪk)
[f. di-2 + θεῖον sulphur + -ic. (The formative -thionic is used for a group of compounds containing H2O6, in combination with two or more atoms of sulphur.)]
In dithionic acid, a synonym of hyposulphuric acid, H2S2O6, a dibasic acid not isolated in the pure state, but forming crystallizable salts, called dithionates (daɪˈθaɪənət).
| 1854 J. Scoffern in Orr's Circ. Sc. Chem. 285 Hyposulphuric acid (Dithionic acid). 1868 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 Hardwich's Photogr. Chem. 97 All the acids being unstable with the exception of the Dithionic. |