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: Systematic name: sulphuric(IV) acid
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
How to use sulphurous acid in a sentence
Thus far the value of the products obtained by absorption of sulphurous acid has not been equal to the cost of producing them.Scientific American Supplement No. 299 | Various
sulphurous acid can fulfil in this instance a double function, viz.Animal Proteins | Hugh Garner Bennett
The gum is dissolved in water, and sulphurous acid gas passed through the solution.
Hence the necessity of having a little free sulphurous acid in each tube.A Textbook of Assaying: For the Use of Those Connected with Mines. | Cornelius Beringer and John Jacob Beringer
The colour, however, is not removed by boiling or by sulphurous acid.A Textbook of Assaying: For the Use of Those Connected with Mines. | Cornelius Beringer and John Jacob Beringer