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Sulfanilic acid Anhydrous
  • 500g

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  • 2.5kg

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  • 12kg

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  • 50kg

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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. Sulfanilic acid has four primary end uses. It is used as an intermediate in the production of yellow food dye, specific pharmaceutical applications, optical brighteners for white paper and as a concrete additive. The sulfanilic acid intermediate can be purchased in four different grades - technical grade, pure grade, sodium sulfanilate solution and sodium sulfanilate dry powder.

PHYSICAL DESCRIPTION: White powder with faint purple tinge. Grayish-white flat crystals. Becomes anhydrous at around 212°F. Low toxicity (used medicinally).

Formula
C6H7NO3S
Molar mass
173.19 g/mol
CAS Number
121-57-3
Density
1.49 g/cm?
Appearance
Powder
Purity/Grade
Reagent
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