† hydrosulphaten.
/hʌɪdrəʊˈsʌlfət/ Chemistry. Obsolete.
An earlier term for a salt of hydrosulphuric acid, now called a hydrosulphide or sulphydrate.
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hydrosulphate1828
hyposulphite1872
1828 N. Webster Amer. Dict. Eng. Lang. Hydrosulphate, the same as hydrosulphuret.
1842 E. A. Parnell Elements Chem. Anal. (1845) 88 Hydrosulphate of ammonia..when added to such an alkaline solution, produces a brown precipitate of sulphuret of copper.
1854 J. Scoffern in Orr's Circle Sci., Chem. 452 With..the hydrosulphates..a black precipitate is furnished.
1863 H. Watts Dict. Chem. I. 194 Sulphydrate or Hydrosulphate [of Ammonium] NH4.H.S.—Obtained by mixing dry hydrosulphuric acid and ammonia... It is a combination of the two gases in equal volumes.
This entry has not yet been fully updated (first published 1899; most recently modified version published online March 2022).
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