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CAS 88-21-1

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2-Aminobenzenesulfonic acid

Description:
2-Aminobenzenesulfonic acid, also known as sulfanilic acid, is an aromatic sulfonic acid characterized by the presence of both an amino group (-NH2) and a sulfonic acid group (-SO3H) attached to a benzene ring. This compound is typically a white to light yellow crystalline solid that is soluble in water, which is a notable feature due to the polar nature of the sulfonic acid group. It has a melting point that varies depending on purity and form, and it exhibits acidic properties due to the sulfonic acid group. 2-Aminobenzenesulfonic acid is commonly used in the synthesis of azo dyes, as well as in the manufacture of various pharmaceuticals and chemical intermediates. Additionally, it serves as a reagent in analytical chemistry, particularly in the determination of nitrite and nitrate ions. The compound is also known for its role in biological systems, where it can act as a precursor to other biologically active molecules. Safety precautions should be observed when handling this substance, as it may cause irritation to the skin and eyes.
Formula:C6H7NO3S
InChI:InChI=1S/C6H7NO3S/c7-5-3-1-2-4-6(5)11(8,9)10/h1-4H,7H2,(H,8,9,10)
InChI key:InChIKey=ZMCHBSMFKQYNKA-UHFFFAOYSA-N
SMILES:S(=O)(=O)(O)C1=C(N)C=CC=C1
Synonyms:
  • 1-Aminobenzene-2-sulfonic acid
  • 2-Aminobenzene-1-sulfonic acid
  • 2-Aminobenzenesulfonate
  • 2-Aminobenzenesulfonic acid
  • 2-Aminobenzenesulphonic Acid
  • 2-Aminophenylsulfonic acid
  • 2-Anilinesulfonic acid
  • 2-Sulfoaniline
  • Aniline-o-sulfonic acid
  • Benzenesulfonic acid, 2-amino-
  • See more synonyms
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