Sulphureted hydrogen. (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,
or Nordhausen 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.
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"phur*yl) n. [Sulphur + -yl.] (Chem.) The hypothetical radical SO2; called also sulphon.
(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