Aniline sulfate

Sulfonation. Aniline reacts with sulfuric acid at high temperatures to form -aminoben2enesulfonic acid (sulfanilic acid [121 -57-3]). The initial product, aniline sulfate, rearranges to the ring-substituted sulfonic acid (40). If the para position is blocked, the (9-aminoben2enesulfonic acid derivative is isolated. Aminosulfonic acids of high purity have been prepared by sulfonating a mixture of the aromatic amine and sulfolane with sulfuric acid at 180-190°C (41). 

Benzanthrone has been prepared by three general methods, the first of which is generally regarded as the best (i) by heating a reduction product of anthraquinone with sulfuric acid and glycerol,1 or with a derivative of glycerol, or with acrolein. The anthraquinone is usually reduced in sulfuric acid solution, just prior to the reaction, by means of aniline sulfate, iron, , or copper. It has also been prepared (2) by the action of aluminum or ferric chloride on phenyl-a-naphthyl ketone, and (3) from i-phenylnaphthalene-2-carboxylic acid. ... 

Diazoaminobenzene has been prepared by the action of sodium nitrite on aniline sulfate by the action of sodium nitrite on aniline hydrochloride by the action of sodium nitrite and sodium acetate on aniline hydrochloride by the action of ammonium nitrate and hydrogen sulfide on aniline hydrochloride in the presence of iron and by the action of amyl nitrite on aniline. ... 

Dia2oaminoben2ene has also been prepared by the action of nitrous acid gas on aniline in alcohol by the action of silver nitrite on aniline hydrochloride and together with phenylurea by the action of nitrosophenylurea on aniline in methyl alcohol. Niementowski and Roszkowski have reported studies on the diazotization of aniline, aniline hydrochloride, and aniline sulfate with sodium nitrite and silver nitrite. The procedure described is adapted from that of Fischer. ... 

It is important that the materials should be added in the correct order should the sulfuric acid be added before the ferrous sulfate, the reaction may start at once. It is also important to mix the materials well before applying heat the aniline sulfate should have dissolved almost completely and the ferrous sulfate should be distributed throughout the solution. To avoid danger of overheating, it is well to apply the flame away from the center of the flask where any solids would be liable to congregate. 

Benzenediazonium Sulfate(Diazobenzene Sulfate), C Hs.N2.0.S03H mw 202.18, N 13.86% wh hygr prisms(from aq ale by pptn with eth), mp- expl ca 100° v sol in w si sol in dil ale insol in eth. Can be prepd by treating, in the cold, aniline sulfate in a mixt of glac AcOH with the ealed amt of sulfuric acid and a si excess of amyl nitrite. This compd expl from heat or shock Refs 1)Beil 16,431-2 2)P.Griess,Ann 137,48 (1866) JCS 20,41-3(1867) 3)E.Knoevenagel,... 

Several modifications of the original method are known. Aniline sulfate may also be used for the quantitative detn of chlorates(Ref l,pp 243 4 Ref 8, vol 2,pp 266-7)... 

Aniline sulfate is dissolved in 0.1N sulphuric acid in aqueous solution or 60% (v/v) ethanol to a final concentration of 1-6 % (w/v). This stain reacts with lignin, which will turn yellow. 

Differences In hydrolysis characteristics are used in analytical test procedures to Identify the easily dissociated esters by polymer and tltratable acidity, amd the less reactive by total acidity procedures. Total hydrocarbon content is determined by carbon analysis,and uncombined by the aniline sulfate procedure. 

Substituted p-phenylenediamines are developers used in color photography. They include A,A-diethyl-p-phenylenediamine (p-diethylaminoaniline) monohydrochloride, its toluidine analog, A-p-anilinopyrrolidine, 4-amino-A-/S-methanesulfonamidoethyl-m-toluidine sesquisulfate monohydrate and 4-amino-3-methyl-A-ethyl-A-(/9-hydroxy -ethyl)aniline sulfate. 

Adipic Acid 124-04-9 Ammonium Carbonate 506-87-6 Aniline Sulfate 542-16-5... 

Diisopropylidene Acetone 542-16-5 Aniline Sulfate 57-10-3 Palmitic Acid... 

Sulfanilic Acid from Aniline. Aniline sulfate is converted to sulfanilic acid by baking ... 

Aniline sulfate is first prepared in a cast-iron kettle equipped with a reflux condenser and 25-rpm propeller agitator. Sulfuric acid (3,520 lb 92 per cent acid—33.0 lb moles 100 per cent acid) is charged to the kettle. The aniline (3,030 lb—32.5 lb moles) is then added through an orifice with agitation as the temperature rises to 150°C, aniline and water being refluxed in the condenser. Two hours after addition of the aniline, the reaction is complete. 

These equilibria represent a more or less ideal case, since as a rule other substances are present, and also the nitro-amine which may be formed reacts farther. If sulfuric acid is present, a ternary intermediate compound would be formed. If acetanilide were used instead of aniline, the general reaction would be similar. If, however, a large excess of sulfuric acid were used in the reaction, then the aniline would be present practically entirely as aniline sulfate and there would not be the tautomeric form present. Under these circumstances, the intermediate compound would not be the same as before, and the nitration would proceed as if benzene itself were being nitrated. Mainly meta compound would be obtained under these conditions. The velocity of nitration of benzene derivatives containing different substituents was studied by H. Martinsen [Z. physik. Chem. 50, 385 (1905) 50, 605 (1907)1. He found the velocities to be dependent upon the substituents in the following way ... 

Ammonium nitrate Ammonium nitrite Ammonium oxalate Ammonium salicylate Ammonium sulfate Ammonium sulfide Ammonium sulfite Ammonium thiosulfate Amyl acetate Amyl alcohol Amyl chloride Amyl mercaptan Amyl naphthalene Amyl nitrate Amyl nitrite Amyl phenol Aniline hydrdochloride Aniline sulfate Aniline sulfite Animal fats Animal oils Anthraquinone Antimony sulfate Antimony tribromide Antimony trichloride Antimony trioxide Aqua regia Arsenic oxide Arsenic trichloride Arsenic trioxide Arsenic trisulfide Ascorbic acid Barium carbonate Barium chlorate Barium chloride, aqueous Barium cyanide Barium hydroxide Barium iodide Barium nitrate Barium oxide Barium peroxide Barium salts Beet sugar liquors Benzaldehyde Benzene... 

Ramie fibers consist of a very high proportion of pure cellulose. Therefore, treatment with iodine and sulfuric acid turns the fiber pure blue, but treating it with aniline sulfate gives no color. Treatment with zinc chlor-iodide reagent gives the fiber a blue color, while the fiber color is rose red when treated with calcium chlor-iodide [108]. 

Coir, when treated with iodine and sulfuric acid, turns golden yellow and, with aniline sulfate, intense yellow. Schweitzer s reagent does not attack the fiber the latter reaction indicates that it is a lignified fiber [108]. 

One of the principal objectives of Hofmann s work was to synthesize quinine, at that time the only known agent effective against malaria. William Henry Perkin, one of Hofmann s youngest students, devoted a great deal of imagination to the synthesis of quinine. In 1856, Perkin tried to synthesize quinine by oxidation of N-allyltoluidine, but instead obtained only a red-brown precipitate. As a model reaction Perkin chose to investigate the treatment of aniline sulfate with potassium dichromate. 

Aniline sulfate Aniline sulfide Anthracene Ascorbic acid Bacteria... 

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