sulphonic acid

British

/ sʌlˈfɒnɪk /

noun

any of a large group of strong organic acids that contain the group –SO 2 OH and are used in the manufacture of dyes and drugs

"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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Some of those named here dye the animal fibres, even without mordants; some are Direct Colours possessing mordant-dyeing 750 properties, others are sulphonic acid derivatives of Alizarin Colours, suitable for wool but not for cotton.

From Project Gutenberg

The pure substances are best obtained by fusion of the corresponding toluene sulphonic acids with potash.

From Project Gutenberg

An important nucleus-synthetic reaction is the saponification of nitriles, which may be obtained by the interaction of potassium cyanide with a halogen substitution derivative or a sulphonic acid.

From Project Gutenberg

The aromatic dihydric alcohols are easily condensed with the different sulphonic acids and yield valuable tanning matters.

From Project Gutenberg

Alizarin S is a sulphonic acid derivative of alizarin, and since it is much more soluble, it readily yields level colours.

From Project Gutenberg

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