4-Amino-benzenesulfonic acid powder Raw Materials CAS 121-57-3

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Uses and synthesis of 4-Amino-benzenesulfonic acid powder

4-Amino-benzenesulfonic acid powder White, off-white crystal or powder. mp about 288 ° C (decomposition); relative density d251. 485. 4-Amino-benzenesulfonic acid CAS 121-57-3 Easily soluble in ammonia and alkali metal hydroxide or carbonate solution, more Soluble in hot water, slightly soluble in cold water, slightly soluble in hot methanol, almost insoluble in ethanol, ether, benzene.

Solubility in water: (20 ℃) 1%; (30 ℃) 1.45%; (40 ℃) 1.94%. Color change at the sight of light.4-Amino-benzenesulfonic acid Raw Materials Decomposition and carbonization starts at 280℃. Acidic, irritating. Decompose by heat and release toxic gases such as nitrogen and sulfur oxides.

Applications / Functions of 4-Amino-benzenesulfonic acid powder

• 4-Amino-benzenesulfonic acid CAS 121-57-3 is used in the manufacture of azo dyes, etc. It is also used as a pesticide to prevent wheat rust.
• 4-Amino-benzenesulfonic acid powder is mainly used in the manufacture of dyestuffs, printing and dyeing auxiliaries, and the prevention of wheat rust, and used as intermediates for spices, food coloring, pharmaceuticals, whitening agents, pesticides, etc. 4-Amino-benzenesulfonic acid Raw Materials can be used as a reference reagent, experimental reagent and chromatographic reagent. 4-Amino-benzenesulfonic acid Raw Materials can be used as reference reagent, experimental reagent and reagent for chromatographic analysis, used in organic synthesis and chemical analysis.
• Determination of ammonia, cerium and nitrite, determination of aluminum, magnesium, potassium, sodium, iodine, iodide and nitrite. Elemental analysis standards for carbon, hydrogen, nitrogen, oxygen and sulfur, 4-Amino-benzenesulfonic acid powder with 1-naphthylamine to determine nitrites, osmium and ruthenium, potassium indirectly through potassium nitrite, serum bilirubin, soil analysis.

Physicochemical Property of 4-Amino-benzenesulfonic acid powder

White or off-white crystal. Hydrate loses water at 100℃, anhydrous material starts to decompose and carbonize at 280℃. Relative density 1.485(25/4).4-Amino-benzenesulfonic acid CAS 121-57-3 Slightly soluble in cold water, insoluble in ethanol, ether and benzene, with remarkable acidity, soluble in caustic soda solution and sodium carbonate solution.

Production methodprocess of 4-Amino-benzenesulfonic acid powder

Drop aniline into concentrated sulfuric acid to react, the reaction mixture is poured into cold water to get colorless precipitate of p-aminobenzenesulfonic acid. After cooling, filter and dry to get 4-Amino-benzenesulfonic acid CAS 121-57-3.

4-Amino-benzenesulfonic acid powder can be obtained by reacting aniline with sulfuric acid to form a salt and then transposed.

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