• British Pharmacopoeia Volume V
  • Appendices
  • Appendix I A. General Reagents

Sulfanilic Acid
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Sulfanilic Acid 4-Aminobenzenesulfonic acid, sulphanilic acid; C6H7NO3S = 173.2 (121-57-3)

Colourless crystals, sparingly soluble in water, practically insoluble in ethanol (96%).