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sulphurous acid

British  

noun

  1. Systematic name: sulphuric(IV) acid.  an unstable acid produced when sulphur dioxide dissolves in water: used as a preservative for food and a bleaching agent. Formula: H 2 SO 3

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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In the manufacture of starch, the corn is first "soaked" or "steeped" in a dilute sulphurous acid water for approximately 36 hours.

From Time Magazine Archive

An aqueous solution of fuchsine is decolorized on the addition of sulphurous acid, the easily soluble fuchsine sulphurous acid being formed.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" by Various

It acts more rapidly than equal quantities of sulphurous acid, and it does not affect colours.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5 "Dinard" to "Dodsworth" by Various

The destruction of the coloring matters attached to the bodies to be bleached is effected either by the action of the air and light, of chlorine, or of sulphurous acid.

From Webster's Unabridged Dictionary (2nd 100 Pages) by Webster, Noah

As a gaseous disinfectant for rooms, etc. chlorine is superior to sulphurous acid, but it has the disadvantage of injuring metals, is not so easily applied, and is more costly.

From A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases by Various