hyposulphiten.

/hʌɪpə(ʊ)ˈsʌlfʌɪt/

/hɪpə(ʊ)ˈsʌlfʌɪt/

Etymology: < French hyposulfite: see hypo- prefix 1e and sulphite n.

Chemistry.

A salt of hyposulphurous acid.

a. Originally (and still commercially) applied to the salts now called by chemists thiosulphates; as hyposulphate of soda = sodium thiosulphate.

ΘΚΠ

the world > matter > chemistry > chemical substances > salts > [noun] > salts named by atomic number > sulphates or sulphites > throsulphate

hyposulphite1823

thiosulphate1873

1823 W. Henry Elements Exper. Chem. (ed. 9) II. ix. 123 Hypo-sulphite of silver may be formed by mixing hyposulphite of soda with dilute nitrate of silver, or by dissolving chloride of silver in any of the hypo-sulphites. Though formed of ingredients that have a metallic and very bitter taste, its flavour is intensely sweet.

1868–72 H. Watts Dict. Chem. V. 540 Allied to the sulphates there is a group of salts called thiosulphates, or more frequently hyposulphites.

1894 H. E. Roscoe & C. Schorlemmer Treat. Chem. I. 412 Thiosulphuric acid..forms a series of stable salts known as the thiosulphates (hyposulphites).

b. Now, with chemists, a salt of the acid H₂S₂O₄, formerly called a hydrosulphite.

ΘΚΠ

the world > matter > chemistry > chemical substances > salts > [noun] > salts named by atomic number > sulphates or sulphites > hyposulphite

hydrosulphate1828

hyposulphite1872

1872 H. Watts Dict. Chem. Suppl. VI. 1063 The formation of thiosulphates..is only a secondary reaction due to the slow and spontaneous decomposition of the hyposulphite.

1877 H. Watts Fownes's Man. Elem. Chem. (ed. 12) I. 213 The solution..solidifies in a few hours to a mass of slender colourless needles, consisting of sodium hyposulphite.

1894 H. E. Roscoe & C. Schorlemmer Treat. Chem. I. 409 Sodium hyposulphite (Na₂S₂O₄) is employed by the dyer and calico-printer for the reduction of indigo, as it possesses the same reducing properties as the free acid.

This entry has not yet been fully updated (first published 1899; most recently modified version published online June 2018).

单词	hyposulphite
释义	hyposulphiten. /hʌɪpə(ʊ)ˈsʌlfʌɪt//hɪpə(ʊ)ˈsʌlfʌɪt/ Etymology: < French hyposulfite: see hypo- prefix 1e and sulphite n. Chemistry. A salt of hyposulphurous acid. a. Originally (and still commercially) applied to the salts now called by chemists thiosulphates; as hyposulphate of soda = sodium thiosulphate. ΘΚΠ the world > matter > chemistry > chemical substances > salts > [noun] > salts named by atomic number > sulphates or sulphites > throsulphate hyposulphite1823 thiosulphate1873 1823 W. Henry Elements Exper. Chem. (ed. 9) II. ix. 123 Hypo-sulphite of silver may be formed by mixing hyposulphite of soda with dilute nitrate of silver, or by dissolving chloride of silver in any of the hypo-sulphites. Though formed of ingredients that have a metallic and very bitter taste, its flavour is intensely sweet. 1868–72 H. Watts Dict. Chem. V. 540 Allied to the sulphates there is a group of salts called thiosulphates, or more frequently hyposulphites. 1894 H. E. Roscoe & C. Schorlemmer Treat. Chem. I. 412 Thiosulphuric acid..forms a series of stable salts known as the thiosulphates (hyposulphites). b. Now, with chemists, a salt of the acid H₂S₂O₄, formerly called a hydrosulphite. ΘΚΠ the world > matter > chemistry > chemical substances > salts > [noun] > salts named by atomic number > sulphates or sulphites > hyposulphite hydrosulphate1828 hyposulphite1872 1872 H. Watts Dict. Chem. Suppl. VI. 1063 The formation of thiosulphates..is only a secondary reaction due to the slow and spontaneous decomposition of the hyposulphite. 1877 H. Watts Fownes's Man. Elem. Chem. (ed. 12) I. 213 The solution..solidifies in a few hours to a mass of slender colourless needles, consisting of sodium hyposulphite. 1894 H. E. Roscoe & C. Schorlemmer Treat. Chem. I. 409 Sodium hyposulphite (Na₂S₂O₄) is employed by the dyer and calico-printer for the reduction of indigo, as it possesses the same reducing properties as the free acid. This entry has not yet been fully updated (first published 1899; most recently modified version published online June 2018). < n.1823
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