Aniline is one of the most essential amine substances. It is mainly used to manufacture dyes, drugs, and resins, as a rubber vulcanization accelerator, etc. It can also be used as a black dye by itself. Its derivative methyl orange can be used as an indicator for acid-base titration.

The industrial production of aniline involves the following two steps. First, benzene is nitrated at 50-60 °C in a mixture of concentrated sulfuric acid and concentrated nitric acid to give nitrobenzene; the latter is then catalytically reduced by hydrogenation (reaction temperature usually between 200-300 °C).


  • Appearance and properties: Colorless or slightly yellow oily liquid with a strong odor.
  • CAS: 62-53-3
  • UN: 1547
  • Molecular formula: C6H7N
  • Melting point (℃): -6.2
  • Boiling point (℃): 184.4
  • Flash point (℃): 70
  • Density: 1.02 g/cm³
  • Solubility: slightly soluble in water, ethanol, ether, and benzene.