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    Sulfanilic Acid

    Sulfanilic Acid in Tradeasia

    IUPAC Name

    4-Aminobenzene-1-sulfonic acid

    Cas Number

    121-57-3

    HS Code

    2921.42.00

    Formula

    C6H7NO3S

    Industry

    -

    Basic Info

    Appearance

    Grey and white powder

    Common Names

    4-Aminobenzenesulfonic acid, p-Aminobenzenesulfonic acid, Sulphanilic Acid

    Packaging

    800 @ 25 kg Bags, 20 MT / 20FCL

    Description:

    Sulfanilic acid (4-aminobenzenesulfonic acid) is a grey crystalline solid which exists as a zwitterion and has an unusually high melting point. As the compound readily forms diazo compounds, it is used to make dyes and sulpha drugs. This property is also used for the quantitative analysis of nitrate and nitrite ions by diazonium coupling reaction with N-(1-Naphthyl)ethylenediamine, resulting in an azo dye, and the concentration of nitrate or nitrite ions were deduced from the color intensity of the resulting red solution by colorimetry.

    Manufacturing:

    Sulfanilic acid can be produced by sulfonation of aniline:

    Applications:

    Sulfanilic acid has four primary end uses. It is used as an intermediate in the production of yellow food dye, specific pharmaceutical applications such as sulfodrugs, optical brighteners for white paper and as a concrete additive. 

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