. Chemistry of dye-stuffs. seems to possess any technical value. This is prepared by fusing azo derivatives of v^^ith a-naphthylamine. Latterly, phenanthrenequinone has been utilised for theproduction of Azine dye-stuffs. In this manner, Flavin-duline or Induline Yellow is obtained by the condensationof phenanthrenequinone w^ith o. amidodiphenylamine. Inthe literature the follov^ing formula is given for this dye-stuff :—. but its accuracy seems open to question, since previous ex-perience teaches that a dye-stuff can only exhibit affinitytov^ards textile fibres provided it c
. Chemistry of dye-stuffs. seems to possess any technical value. This is prepared by fusing azo derivatives of v^^ith a-naphthylamine. Latterly, phenanthrenequinone has been utilised for theproduction of Azine dye-stuffs. In this manner, Flavin-duline or Induline Yellow is obtained by the condensationof phenanthrenequinone w^ith o. amidodiphenylamine. Inthe literature the follov^ing formula is given for this dye-stuff :—. but its accuracy seems open to question, since previous ex-perience teaches that a dye-stuff can only exhibit affinitytov^ards textile fibres provided it contains auxochromegroups, which are lacking in the above formula. By the action of amines, Flavinduline can be made toyield red to blue dye-stuffs. EosiNDULiNE Dye-stuffs. Magdala Red.—This handsome dye-stuff, which givesbeautifully fluorescent dyeings on silk, was formerly classed 312 CHEMISTEY OF DYE-STUFFS. along with the Safranines, and has only recently been identi-fied as an Induline by O. Fischer and Hepp. Magdala Eed was first obtained by Schiendl (1867)by heating a-amidoazonaphthalene with a-naphthylamineacetate. At present it is prepared by fusing together naph-thylenediamine chloride, a-naphthylamine, and amidoazo-naphthalene. 0. Fischer and Hepp obtained it fromamidoazonaphthalene and phenol, and gave it the formula :—
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectdyesanddyeing, bookye
