. (Chem.) See Hydrogen sulphide, under Hydrogen.

(Sul*phu"ric) a. [Cf. F. sulfurique.]

1. Of or pertaining to sulphur; as, a sulphuric smell.

2. (Chem.) Derived from, or containing, sulphur; specifically, designating those compounds in which the element has a higher valence as contrasted with the sulphurous compounds; as, sulphuric acid.

Sulphuric acid. (a) Sulphur trioxide (see under Sulphur); — formerly so called on the dualistic theory of salts. [Obs.] (b) A heavy, corrosive, oily liquid, H2SO4, colorless when pure, but usually yellowish or brownish, produced by the combined action of sulphur dioxide, oxygen steam, and nitric fumes. It attacks and dissolves many metals and other intractable substances, sets free most acids from their salts, and is used in the manufacture of hydrochloric and nitric acids, of soda, of bleaching powders, etc. It is also powerful dehydrating agent, having a strong affinity for water, and eating and corroding paper, wood, clothing, etc. It is thus used in the manufacture of ether, of imitation parchment, and of nitroglycerin. It is also used in etching iron, in removing iron scale from forgings, in petroleum refining, etc., and in general its manufacture is the most important and fundamental of all the chemical industries. Formerly called vitriolic acid, and now popularly vitriol, and oil of vitriol.Fuming sulphuric acid, orNordhausen sulphuric acid. See Disulphuric acid, under Disulphuric.Sulphuric anhydride, sulphur trioxide. See under Sulphur.Sulphuric ether, common anæsthetic ether; — so called because made by the catalytic action of sulphuric acid on alcohol. See Ether, 3 (a).

(Sul"phur*ine) a. Sulphureous. [R.]

(Sul"phur*ing), n. Exposure to the fumes of burning sulphur, as in bleaching; the process of bleaching by exposure to the fumes of sulphur.

(Sul"phur*ize) v. t. (Chem.) To combine or impregnate with sulphur or any of its compounds; as, to sulphurize caoutchouc in vulcanizing.

(Sul"phur*ous) a. [L. sulphurosus, sulfurosus: cf. F. sulfureux.]

1. Of or pertaining to sulphur.

2. (Chem.) (a) Derived from, or containing, sulphur; specifically, designating those compounds in which the element has a lower valence as contrasted with the sulphuric compounds. (b) Having the characteristic odor of sulphur dioxide, or of hydrogen sulphide, or of other sulphur compounds.

Sulphurous acid. (a) Sulphur dioxide. See under Sulphur. [Obs.] (b) An acid, H2SO3, not known in the free state except as a solution of sulphur dioxide in water, but forming a well- known series of salts Sulphurous anhydride(Chem.), sulphur dioxide. See under Sulphur.

(Sul"phur*wort`) n. (Bot.) The hog's fennel. See under Fennel.

(Sul"phur*y) a. Resembling, or partaking of the nature of, sulphur; having the qualities of sulphur.

(Sul"phur*yl) n. [Sulphur + -yl.] (Chem.) The hypothetical radical SO2; — called also sulphon.

Sulphuryl chloride, a chloride, pungent, fuming liquid, SO2.Cl2, obtained by the action of phosphorus pentachloride on sulphur trioxide. On treatment with water it decomposes into sulphuric and hydrochloric acids, and is hence called also sulphuric chloranhydride.

(Sul*phy"drate) n. (Chem.) A compound, analogous to a hydrate, regarded as a salt of sulphydric acid, or as a derivative of hydrogen sulphide in which one half of the hydrogen is replaced

Sulphureted hydrogen

  By PanEris using Melati.

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