sulphonic acid

/ sʌlˈfɒnɪk /

noun

1. 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

Example Sentences

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.

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

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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.

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

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

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