This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 Excerpt: ...(Pyronine G) is obtained by oxidation. It has the formula: --Pyronine B is the corresponding ethyl derivative. The pyronines yield brilliant bluish-red shades on cotton mordanted with tannic acid. Gallein and Caerulein 65. Gallein.--The first product of the interaction of phthalie anhydride and pyrogallol is a ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 Excerpt: ...(Pyronine G) is obtained by oxidation. It has the formula: --Pyronine B is the corresponding ethyl derivative. The pyronines yield brilliant bluish-red shades on cotton mordanted with tannic acid. Gallein and Caerulein 65. Gallein.--The first product of the interaction of phthalie anhydride and pyrogallol is a phthalein anhydride analogous to fluorescein, which, however, undergoes further oxidation by the air, two hydroxyl groups being converted to quinone groups. The gallein thus formed possesses the formula--It differs from fluorescein in containing two quinone oxygen atoms in combination with two benzene rings. Gallein is generally prepared by heating phthalie anhydride with gallic acid to 200. The latter is converted into pyrogallol at this temperature, carbonic acid being split off. In the pure state gallein forms brilliant green crystals or a brownish-red powder, easily soluble in alcohol with a dark red colour, and difficultly soluble in ether. The salts with the alkalies, lime, and baryta are soluble in water with a red colour, which is turned blue by an excess of alkali. On reduction, it is converted to hydrogallein and, finally, to gallin. It forms greyish-violet lakes with alumina and chromic oxide. It produces a fine violet on wool mordanted with bichromate. In printing it is applied with acetate of aluminium or chromium and steamed, whereby acetic acid is liberated, and the aluminium or chromium lake of gallein is fixed on the fibre. Ccerule'in 65, C20H806, is formed by heating gallein with twenty times its weight of concentrated sulphuric acid to 200. The dyestuff is precipitated by water, and in this state forms a bluish-black powder, which takes a metallic lustre on rubbing. It is almost insoluble in water, alcohol, and ether, slightly solubl...
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Add this copy of Chemistry of the Organic Dye-Stuffs to cart. $21.29, good condition, Sold by Stephen White Books rated 5.0 out of 5 stars, ships from Bradford, WEST YORKSHIRE, UNITED KINGDOM, published 2015 by Sagwan Press.
Add this copy of Chemistry of the Organic Dye-Stuffs to cart. $68.07, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by Palala Press.
