sulphurous acid


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Related to sulphurous acid: H2SO3

sulphurous acid

n
(Elements & Compounds) an unstable acid produced when sulphur dioxide dissolves in water: used as a preservative for food and a bleaching agent. Formula: H2SO3. Systematic name: sulphuric(IV) acid
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Translations
schweflige Säure
References in periodicals archive ?
Extensively used food-preservatives are salicylic, benzoic, and boric acids, and their sodium salts, formaldehyde, ammonium fluoride, and sulphurous acid. "Many of these appear to be innocuous, but there is danger that the continued use of food preserved by these agents may be injurious.
The objective of this research was, therefore, to assess safety of fresh and processed fruit products marketed in Kenya in terms of content of microbial total plate count, yeast and mould, coliforms and Staphylococcus aureus, and the preservatives; benzoic acid and sulphurous acid compared to FAO/WHO Codex standards and Kenya standards.
Due to presence of moisture in atmospheric air these oxides react with moisture and forms sulphurous acid. The oxides react in the atmosphere forming sulphuric acid, which leads to acid rain.
Inside the system, condensation of combustion gases produces sulphurous acid, sulphuric acid and low levels of hydrochloric acid, creating critical conditions with acidic pH-values (Gumpel P.
In 1855 Playfair suggested that, rather than using ships, another way of delivering the agent onto a target would be to 'fill strong iron boilers with liquid sulphurous acid made by condensing sulphur fumes under pressure.' Substitute 'iron cylinders' for 'iron boilers' and what one has, to all intents and purposes, is the equipment used during the Great War to deliver cloud gas attacks.