Technical Chemistry. oA 
either aniline purple or violine;, but, like them, it is insoluble in hydro- 
carbons, and is more soluble in acids than in neutral liquids. Concen- 
and is also deodorized, or nearly so, by powerful reducing agents. 
The three coloring matters just mentioned, namely, aniline purple, 
Violine, and roseine, are evidently closely allied, for they have nearly the 
Same properties. They are all formed under similar circumstances, 
namely, by th ‘ 
they are all slightly soluble in water, though as the shade of color be- 
comes redder, so their solubility increases; alkalies precipitate them 
forming green solutions, which excess of water restores to the original 
color of the coloring matters; powerful reducing agents deprive them of 
their color, or nearly so; but it is again restored by the Pars of 
stances, and possessing very different properties. This coloring matter 
Mercury. It has also been prepared with bichlorid of carbon. iz 
Preparation of Fuchsine by the Action of Bichlorid of Tin on Aniline, 
compound, it is necessary that it should be free from water, or nearly 
80; therefore, anhydrous chlorid of _tin is generally employed for its 
i 
rs, presents a rich crimson color. This is kept at its boiling 
