Sulphurous acid

Sulphurous acid
Sulphurous Sul"phur*ous, a. [L. sulphurosus, sulfurosus: cf. F. sulfureux.] 1. Of or pertaining to sulphur. [1913 Webster]

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. [1913 Webster]

{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 (the sulphites).

{Sulphurous anhydride} (Chem.), sulphur dioxide. See under {Sulphur}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • sulphurous acid — noun An unstable acid, H2SO3, used as a food preservative and bleaching agent • • • Main Entry: ↑sulphur …   Useful english dictionary

  • sulphurous acid — Sulphur Sul phur, n. [L., better sulfur: cf. F. soufre.] 1. (Chem.) A nonmetallic element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast… …   The Collaborative International Dictionary of English

  • sulphurous acid — /sʌlfərəs ˈæsəd/ (say sulfuhruhs asuhd) noun an acid, H2SO3, formed by dissolving sulphur dioxide in water, known mainly by its salts (sulphites). Also, sulfurous acid …  

  • sulphurous acid — noun Chemistry an unstable weak acid formed when sulphur dioxide dissolves in water. [H2SO3.] …   English new terms dictionary

  • Sulphurous — Sul phur*ous, a. [L. sulphurosus, sulfurosus: cf. F. sulfureux.] 1. Of or pertaining to sulphur. [1913 Webster] 2. (Chem.) (a) Derived from, or containing, sulphur; specifically, designating those compounds in which the element has a lower… …   The Collaborative International Dictionary of English

  • Sulphurous anhydride — Sulphurous Sul phur*ous, a. [L. sulphurosus, sulfurosus: cf. F. sulfureux.] 1. Of or pertaining to sulphur. [1913 Webster] 2. (Chem.) (a) Derived from, or containing, sulphur; specifically, designating those compounds in which the element has a… …   The Collaborative International Dictionary of English

  • sulphurous anhydride — Sulphur Sul phur, n. [L., better sulfur: cf. F. soufre.] 1. (Chem.) A nonmetallic element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast… …   The Collaborative International Dictionary of English

  • sulphurous — adj. (US sulfurous) 1 relating to or suggestive of sulphur, esp. in colour. 2 Chem. containing quadrivalent sulphur. Phrases and idioms: sulphurous acid an unstable weak acid used as a reducing and bleaching acid. Etymology: L sulphurosus f.… …   Useful english dictionary

  • Sulphur acid — Sulphur Sul phur, n. [L., better sulfur: cf. F. soufre.] 1. (Chem.) A nonmetallic element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast… …   The Collaborative International Dictionary of English

  • sulphuric acid — Sulphur Sul phur, n. [L., better sulfur: cf. F. soufre.] 1. (Chem.) A nonmetallic element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast… …   The Collaborative International Dictionary of English

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