Sodium sulfanilate

A) Diazotizalion of Sulfanilic Acid.—A mixture of 105 g. (0.5 mole) of sulfanilic acid dihydrate, 26.5 g. (0.25 mole) of anhydrous sodium carbonate, and 500 cc. of water is heated and stirred until all the sulfanilic acid has dissolved, and the solution is then cooled in an ice bath to 15° (sodium sulfanilate begins to crystallize at this temperature). A solution of 37 g. (0.54 mole) of sodium nitrite in 100 cc. of water is added and the resulting solution is poured at once onto a mixture of 106 cc. (1.25 moles) (Note i) of concentrated hydrochloric acid (sp. gr. 1.18) and 600 g. of ice contained in a 2-I. beaker. The solution, from which -benzenediazonium sulfonate separates on stirring, is allowed to stand in an ice bath for fifteen to twenty-five minutes, during which time the naphtholate solution is prepared. 

In order to prepare the Pauly reagent two solutions, solution I (0.4 M sodium sulfanilate in water) and solution II (0.4 M sodium nitrite in water) are made separately. Just before use, solution I with solution II, 0.25 M HC1, and 2 M NaOH (1 1 8 10) are mixed successively. This solution, which is not stable, should be applied as a spray within minutes and discarded. The ninhydrin test will not interfere with the Pauly reagent. 

Bimetallic particles with layered structures have opened fascinating prospects for the design of new catalysts. Schmid et al. [10m] have applied the classical seed-growth method [20] to synthesize layered bimetallic Au/Pd and Pd/Au colloids in the size range of 20-56 nm. The sequential reduction of gold salts and palladium salts with sodium citrate allows the gold core to be coated with Pd. This layered bimetallic colloid is stabilized by trisulfonated triphenylphosphane and sodium sulfanilate. More than 90% metal can be isolated in the solid state and is redispersable in water in high concentrations. 

A buffer is prepared by dissolving 0.20 mol of sulfanilic acid and 0.13 mol of sodium sulfanilate (NaNH2CgH4S03) in water and diluting to 1.00 L. 

Sodium sulfanilate [515-74-2] M 195.2. It crystallises from water. [Beilstein 14 1V 2655.]... 

The indirect method Diazotization of sulfanilic acid 2495 A solution of sodium sulfanilate (23 g) and sodium nitrite (7 g) in water (120 ml) is cooled to 0° and dropped with stirring into an ice-cold solution of concentrated sulfuric acid (17 ml) in water (100 ml). The diazonium salt separates instantaneously. 

Aminobenzenesulfonic acid, monosodium salt 4-Aminobenzenesulfonic acid, sodium salt. See Sodium sulfanilate p-Aminobenzenesulfonoacetamide. See Sulfacetamide... 

Benzenesulfonic acid, 4-amino-, monosodium salt. See Sodium sulfanilate Benzenesulfonic acid, 2-amino-5-((4-sulfophenyl) azo)- Benzenesulfonic acid, 4-(4-amino-3-sulfophenylazo). See Acid yellow 9 Benzenesulfonic acid, 2-anilino-5-(2,4-dinitroanilino)-, monosodium salt. See Acid orange 3... 

Monosodium acid methanearsonate. See Sodium acid methanearsonate Monosodium 4-aminobenzenesulfonate. See Sodium sulfanilate... 

Rutin Sodium ascorbate Sodium erythorbate Sodium sulfanilate Sorbityl furfural Tetrasodium EDTA Thiodiglycol Thiodiglycolamide Thioglycerin Thiomorpholinone... 

Silver nitrate Sodium sulfanilate dyeing, hair care Silver nitrate Sodium sulfanilate dyeing, industrial Propylene glycol alginate dyeing, leather... 

Dragosantol 2/012681 Hydagen B Uhydagen B 208-208-5 Sodium sulfanilate 208-214-8 Ammonium lactate Lexalt AL Purasal NH 70 Purasal NH/COS 208-220-0 DL-a-Valine 208-237-3 Hematoxylin 208-253-0 D C Yellow No. 8 Fluorescein sodium 208-258-8 Emodin 208-288-1 Hesperidin 208-292-3 Apigenin 208-293-9 Dehydroacetic acid Unisept DHA 208-360-2... 

Ami nobenzene sulfonic acid Metanilic acid Sulfanilic acid C6H7NO3S Na Sodium sulfanilate C6H7NO4S... 

Reagent Solution A 2.9 g of sodium sulfanilate (dihydrate) and 70. g of NaN02 are dissolved in 30 ml of water. Solution B 1.8 g of a-naphthylamine are dissolved in 40 ml of ethanol. Both solutions are mixed shortly before use. 

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