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sulphur dioxide

British

noun

Systematic name: sulphur(IV) oxide. a colourless soluble pungent gas produced by burning sulphur. It is both an oxidizing and a reducing agent and is used in the manufacture of sulphuric acid, the preservation of a wide range of foodstuffs ( E220 ), bleaching, and disinfecting. Formula: SO 2

"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

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sulphur dioxide

The processing of phosphate rock into fertiliser emits toxic gases such as sulphur dioxide and ammonia.

From Barron's ● Oct. 10, 2025

Authorities later said the area around Grindavik was evacuated after sulphur dioxide was detected, sparking fears of a nearby opening in the ground.

From BBC ● Nov. 14, 2023

Nornickel said smelters in the Arctic city of Norilsk release roughly 1.8 million tonnes of sulphur dioxide emissions annually.

From Reuters ● Oct. 25, 2023

This not only releases large amounts of CO2, but also produces toxic gases such as sulphur dioxide.

From Science Daily ● Oct. 20, 2023

Heated in an ignition tube it yields sulphur dioxide.

From The Elements of Blowpipe Analysis by Getman, Frederick Hutton

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023