sulphur dioxide

noun

1. 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 Systematic namesulphur(IV) oxide

Example Sentences

Why is it necessary that the fabric be moist in order to be bleached by sulphur dioxide fumes?

From Project Gutenberg

It burns with a pale blue flame to form carbon dioxide and sulphur dioxide.

From Project Gutenberg

It may be prepared in the amorphous form by heating cobalt with sulphur dioxide, in a sealed tube, at 200 C.

From Project Gutenberg

The goods are left thus exposed to the sulphur dioxide overnight, when they are taken out and washed in water.

From Project Gutenberg

There are practically but two chemicals which are used in gaseous disinfection, and these are sulphur dioxide and formaldehyde.

From Project Gutenberg