The Mauveine are a group of basic azine mauve in the eponymous color. Chemically, it is structurally very similar structure, phenazine derivatives, which are among the Safraninen. The resulting in the production of the dye mixture of the individual compounds is ( e) in the first place as a textile dye. As such, he is also known under the name aniline purple and Perkinviolett.
Mauvein, in an attempt to synthesize quinine, discovered by William Henry Perkin at the age of only 18 years in 1856. He established the dye from aniline, which was oxidized with potassium dichromate. However, the aniline used by him as a starting material containing substantial amounts of o-and p- toluidine, so that the product obtained was a mixture of mauve and Pseudomauvein. According to legend, Perkins first colored piece of cloth was a white blouse before his sister, who then shone in bright mauve.
The Mauveine differ in number and position of methyl groups. In historical dye samples up to 13 different individual compounds were detected, the major components were present Mauvein A, B, B2 and C, ie, structures having 26 to 28 carbon atoms.
Mauvein ( CAS: 6373-22-4 ) is an almost black powder which is insoluble in water but soluble in ethanol. It is resistant to alkalis and acids. A hydrochloride forms greenish shining prisms.
It has a high affinity to fibrous materials, especially cotton and silk which are brilliantly colored.
Until the late 19th and early 20th century, the English penny stamps were stained with Mauvein. Today Mauvein has no more than dye importance.