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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

Prior to 2020, dirty engine oil produced large amounts of sulphur dioxide, a gas harmful to human health.

From BBC ● Oct. 17, 2025

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

From Barron's ● Oct. 10, 2025

Millions of tonnes of sulphur dioxide would need to be injected to have any impact.

From BBC ● Jul. 20, 2024

Company Chief Executive Vladimir Potanin has said Nornickel is looking for solutions at the Copper Plant and plans to reduce sulphur dioxide emissions there tenfold by 2027.

From Reuters ● Oct. 25, 2023

I never cared particularly for hydrogen sulphide and sulphur dioxide, either," he assured her, "but they aren't strong enough to hurt us in the short time we'll be here.

From Spacehounds of IPC by Smith, E. E. (Edward Elmer)

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