sulphonic acid

British  

/ 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

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Example Sentences

In organic chemistry distinction is made between sulphonic acids of the aliphatic and the aromatic series, the characteristic group of these acids being the so-called sulphonic acid group, HSO_3.

From Synthetic Tannins by Grasser, Georg

Hence, if crude Neradol is treated with increasing amounts of caustic soda, a series of products containing increasing quantities of salt and decreasing concentrations of sulphonic acid is obtained.

From Synthetic Tannins by Grasser, Georg

It may be prepared by fusion of ortho-toluene sulphonic acid with potash; by the action of phosphorus pentoxide on carvacrol; or by the action of zinc chloride on camphor.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" by Various

The presence of Neradol D, the main constituent of which is dicresylmethanedisulphonic acid, renders it impossible by such methods to determine whether the combined sulphur owes its origin to sulphuric or sulphonic acid.

From Synthetic Tannins by Grasser, Georg

The halogens do not easily react with sulphonic acids, but when they do they usually replace the sulphonic acid group.

From Synthetic Tannins by Grasser, Georg