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| sulfanilic acid |
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| white powder |
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| 121-57-3 |
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Applications
As the compound readily form diazo compounds, it is used to make dyes and sulpha drugs. [1] 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. |
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CAS NO:121-57-3 sulfanilic acid
Basic Info
Sulfanilic acid
IUPAC name:p-aminobenzenesulphonic acid
CAS Registry Number:121-57-3
Chemical formula:C6H7NO3S
Molar mass:173.19
Density:1.485
Melting point: 288 ¡ÆC (550 ¡ÆF
561 K)
Solubility in water:12.51 g/L
Acidity (pKa): 3.01
Type: Dyestuff Intermediates
Appearance: Powder
Colour: White
Quality: Refined
Export Markets: South America, Southeast Asia
Product Detail
Product name: Sulfanilic acid
Specification: Appearance: White crystal powder
Free aniline: 0.02% max
Water insolbule matter: 0.1% max
Moisture: 0.5% max
Packing: In 25kgs, 350/500/750kgs jumbo bag
Introduction
Sulfanilic acid (4-aminobenzenesulfonic acid ) is an off-white crystalline solid which finds application in quantitative analysis of nitrate and nitrite ions. The solid acid exists as a zwitterion, and has an unusually high melting point.
Applications
As the compound readily form diazo compounds, it is used to make dyes and sulpha drugs. [1] 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. |
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