Resorcine blue

Resorbierung, /. resorption, reabsorption. Resorcin, n. resorcinol, resorcin, -blau, n, resorcin blue, -gelb, n. resorcin yellow. Resorzin, n. resorcinol, resorcin, reap., abbrev. of respektive. respektive, adv. respectively, or rather, or. Respirationsnahrungsnuttel, n. respiratory food. 

Tetrabromresorujin is obtained by action of bromine on an alkaline solution of resorufin. Its sodium salt, Ci2H3Br4NOjNa + 2H2O, forms the commercial Resorcin Blue or Fluorescent Blue. It dyes wool and silk in an acid bath, and produces bluish-violet shades, remarkable for their beautiful red fluorescence. 

L Lacmoid. Resorcin blue Iris Blue B Fluorescent Blue C.l. 51400. Prepn Traub. Hock, Ber. 17, 2615 0884) Musso et al, Angew. Chem. 73, 434 0961) Discussion of structure controversy W. J. Court s Biological Stains, R. D. Lillie, Ed. (Williams Wilkins, Baltimore, 8th ed., 1969) pp 283-284. See also Colour Index vol. 4 (3rd ed., 1971) p 4468. 

Resorcin acetate. See Resorcinol acetate Resorcin blue. See Resorcine bue Resorcin brown. See Acid orange 24 D C Brown No. 1... 

Synonyms Cl 51400 Lacmoid Resorcin blue Resorcinol blue... 

Erythrosine Extra Fuchsin S Guinea Green B Hessian Purple NR Columbian Black Naphthol Yellow S Nyanza Black Orange II Patent Blue A Picric Acid Ponceau 4GB Primuline Resorcin Yellow Rose Indulin 2G Acid Violet 5BN Acid Violet 6B Salm Red Tartrazin... 

Cotton is dyed in a bath containing Glauber s salt and a little soap or soda, and the shades produced vary from dark blue to bluish black, about 6 per cent, of dyestuff being necessary to produce a maximum effect. The diazotising is effected by a bath of sodium nitrite acidified with hydrochloric acid. The developing-bath varies according to the shade required. Resorcin, y8-naphthol, and phenylenediaminc produce blacks of various shades blues are obtained with naphthylamine ether and mixtures of these developers produce blacks of every conceivable shade. 

Lacmold.— This colouring-matter, which probably belongs to the above series, was obtained by heating resorcin with sodium nitrite [46, Traube and Hock]. It forms blue salts with alkalies, and their solutions are turned red by acids. For this reason it has been proposed as an indicator in titration. 

It dissolves in alkalies with a purple colour the colour rapidly changes, with formation of haematei n, to blue-violet, afterwards becoming brown. Chromic acid, ferric chloride, and vanadic acid form higher oxidation products, which give black lakes with metallic oxides. On melting with potash, or on dry distillation, it yields pyrogallol and resorcin [99]. 

Analytical Characters.—(1.) Add a little alcoholic solution of potash and 3--3 drops of anilin and warm a disagreeable odor resembling that of witch-hazel, is produced. (3.) Vapor of CHCls,. when passed through a red-hot tube, is decomposed with formation of HCl and Cl, the former of -which is recognized by the pro duction of a white ppt., soluble in ammonium hydroxid, in ai> acid solution of silver nitrate. This test does not afford reliable results when the substance tested contains a free acid and chlorids. (3.) Dissolve about 0.01 gin. of /3 naphthol in a small quantity of KHO solution, warm, and add the suspected liquid a blue color is produced. (4.) Add about 0.3 grm. resorcin in solution, and 3 gtts. NaHO solution and boil strongly. In the presence of CHCli or of chloral a yellowish-red color is produced, and the liquid exhibits a beautiful yellow-green fluorescence. 

Resorcinol bis (2,3-epoxypropyl) ether. See Resorcinol diglycidyl ether Resorcinol bis (2-hydroxyethyl) ether. See Resorcinol di (P-hydroxyethyl) ether Resorcinol blue. See Resorcine bue Resorcinol diglycidyl ether CAS 101-90-6... 

Alizarin Bromocresol green Bromothymol blue Carminic acid Chlorophenol red m-Cresol purple Curcumin 2,4-Dintrophenol Resorcine bue Thymol blue indicator, alcohol solution p-Nitrophenol... 

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