Sulfanilic acid photograph

Sulfanilic Acid

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Molar mass173. 2 g/mol
FormulaC6H7NO3S
Density1. 48 g/cm³
Solubility in water12. 51 kg/m³
Melting point288 °C (550 °F; 561 K)
Related sulfonic acids Benzenesulfonic acid
p-Toluenesulfonic acid
Date of Reg.
Date of Upd.
ID2339193
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About Sulfanilic Acid


Sulfanilic 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.

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