By extension, any one of the series of substances derived from, or related to, rosaniline proper.
A colorless, crystalline, organic base, obtained from rosaniline by reduction, and also from other sources.
Defn: Pertaining to, or designating, a complex red dyestuff (called rosolic acid) which is analogous to rosaniline and aurin.
Defn: A colorless, crystalline, organic base, obtained from rosaniline by reduction, and also from other sources.
They are in fact the hydroxylic or acid analogues of the amido-containing or basic dyes of the rosaniline series.
Phosgene colours of rosaniline group introduced; leading to manufacture of phosgene.
This last substance is also required by the colour-maker, as it is used in the manufacture of blue by the action of aniline on rosaniline; without some such organic acid the transformation of rosaniline into the blue is very imperfect.
It has been explained that by the methylation of rosaniline Hofmann obtained violet colouring-matters.
The blues and violets obtained from rosaniline belong to this group, and so also do certain other colouring-matters which had been manufactured before the Fischers' discovery.
Girard and De Laire, observed that by heating rosaniline for some time with aniline and an aniline salt, blue and violet colouring-matters were produced.
Other transformations of rosaniline have yet to be chronicled.
Now as rosaniline is obtained by the oxidation of a mixture of aniline and toluidine, it seems but natural that if these bases were methylated first and then oxidized a violet dye would be produced.
Unless carefully crystallised rosaniline will contain a slight proportion of the arseniate, and when articles of clothing are dyed with the salt, it is likely to produce an inflammatory condition of skin, when worn.
It has also been proved that in dyeing the animal fibres with magenta (rosaniline hydrochloride), the fibre unites with the rosaniline only, and liberates the hydrochloric acid.
The explanation is that the base rosanilinehas united with the fibre, which here plays the part of an acid, to form a coloured salt.
The free base rosaniline, for example, is colourless, whereas the salt magenta (rosaniline hydrochloride) has a deep crimson colour in solution.
It is prepared by submitting the residue, from which the rosaniline has been extracted, to a current of steam for some time, when a quantity of the chrysaniline passes into solution.
A few years ago murexid was extensively used in dyeing; it is now almost superseded by rosaniline or magenta.
In order to purify the crude rosaniline hydrochloride it is washed with a small quantity of water, redissolved in boiling water slightly acidulated with hydrochloric acid, filtered, and allowed to crystallise.
In France the hydrochlorate of rosaniline is chiefly employed.
All the salts of rosaniline have a splendid purple-red colour, and that usually met with as magenta is the hydrochlorate, although the nitrate, oxalate, and acetate are also to be obtained.
From magenta or hydrochlorate of rosaniline a large number of colouring matters are produced, the most important of which will be briefly described below.
The solution of hydrochloride, arsenite, and arseniate of rosaniline thus obtained is filtered through woollen cloth, and 720 lbs.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "rosaniline" in a variety of sentences. We hope that you will now be able to make sentences using this word.
