Sulfanilic Acid

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sulfanilic acid

[¦səl·fə¦nil·ik ′as·əd]
(organic chemistry)
C6H4NH2·SO3H·H2O Combustible, grayish-white crystals slightly soluble in water, alcohol, and ether, soluble in fuming hydrochloric acid; chars at 280-300°C; used in medicine and dyestuffs and as a chemical intermediate.

Sulfanilic Acid


(or p-aminobenzenesulfonic acid), a colorless crystalline compound that decomposes at 280°–300°C. It is sparingly soluble in water; 1 g dissolves in 100 g of water at 20°C.

Sulfanilic acid is an inner salt, in which the amino group is neutralized by the sulfo group. Therefore, the acid does not form salts with mineral acids, but its sulfo group may be neutralized by

bases—for example, with the formation of the sodium salt H2N—C6H4SO3Na.

Sulfanilic acid is produced by heating aniline sulfate, C6H5NH2·½H2SO4, at 180°–200°C. Diazotization of sulfanilic acid yields diazobenzenesulfonic acid, Sulfanilic Acid, which is widely used in the production of azo dyes. The amide of sulfanilic acid, H2H—C6H4—SO2NH2 (sulfanilamide), is used in medicine, where it is called Streptocid album. Some of the derivatives of sulfanilamide, including Albucid, sulfonamide (Sul’gin), Sulfidine, sulfamethazine, and sulfazole, or sulfamethylthiazole, are also used in medicine. In the laboratory, sulfanilic acid is used for the determination of nitrites and the detection of several metals, such as osmium and ruthenium.

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Nevertheless, with the CVD law's direct applicability to NME, specifically Chinese, goods now apparently in play, the theological approach reflected in the Sulfanilic Acid decision will almost certainly get a well-deserved second look.
Different grades of sulfanilic acid are compared with their corresponding consumption level within various Chinese markets
I-1 Production situation of sulfanilic acid in 2006~2008
II Trade of sulfanilic acid in China from 2004 to Oct.
III Consumption analysis of sulfanilic acid in China in 2007
III-1 Consumption pattern of sulfanilic acid in China
IV Forecast for the development of sulfanilic acid in next five years in China