Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A colorless crystalline organic base, C20H21N3O, or one of this base's yellow-brown or green crystalline hydrochloride salts which form a red solution in water, derived from aniline and used in the manufacture of fuchsin and other dyes, and in Schiff's reagent.
- noun Any of various compounds, especially dyes, related to or derived from rosaniline.
from The Century Dictionary.
- noun An organic base (C20H21N3O), a derivative of aniline, crystallizing in white needles, capable of uniting with acids to form salts, which are the well-known rosaniline coloring matters of commerce; also, the color thus produced.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Chem.) A complex nitrogenous base, C20H21N3O, obtained by oxidizing a mixture of aniline and toluidine, as a colorless crystalline substance which forms red salts. These salts are essential components of many of the socalled aniline dyes, as
fuchsine ,aniline red , etc. By extension, any one of the series of substances derived from, or related to, rosaniline proper.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun An
organic base , C20H19N3, used to make thedye fuchsine - noun The deep
red ormagenta colour of fuchsine (rosanilinehydrochloride ).
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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In a series of masterly experiments von Baeyer demonstrated several years ago the chemical nature of the phthaleins and showed that, just like the already known rosaniline dyes, they may be classified as derivatives of the hydrocarbon triphenylmethane.
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Members of the rosaniline group are all similarly fugitive, while those of the alizarin group possess generally the quality of fastness.
Scientific American Supplement, No. 810, July 11, 1891 Various
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Neelson found that the pigment of _B. cyanogenus_ gives a band in the yellow and strong lines at E and F in the solar spectrum -- an absorption spectrum almost identical with that of triphenyl-rosaniline.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" Various
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A further proof of the acid nature of lanuginic acid is that wool may be dyed a fine magenta colour in a colourless solution of rosaniline base; for since rosaniline base is colourless, and it only forms a colour when combined with acids, the fibre has evidently acted the part of an acid in the combination.
The Dyeing of Woollen Fabrics Franklin Beech
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If wool is dyed in a dilute solution of Magenta (hydrochloride of rosaniline), the whole of the base (rosaniline) is taken up, and the whole of the acid (HCl) left in the bath, not, however, in the free state, but probably as NH_ {4} Cl, the ammonia being derived from the wool itself.
The Dyeing of Woollen Fabrics Franklin Beech
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