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Sulphanilic acid, 99% (4-aminobenzenesulfonic acid ) is an off-white crystalline solid which finds application in quantitative analysis of nitrate and nitrite ions.
S 2765 (OTTO) Sulphanilic acid, 99% Cas 121-57-3 - used as an intermediate in the production of yellow food dye, specific pharmaceutical applications, optical brighteners for white paper and as a concrete additive.