Aniline is a colourless to brown, oily liquid which darkens on exposure to air and light. It has a characteristic amine odour and a burning taste.

Aniline is soluble in all organic solvents like alcohol, ether and benzene this is because of low polarity in amines and not a stronger intermolecular H- bonding in itself.

Also, Aniline is moderately soluble in water. 

Aniline in water is subject to biodegradation, photodegradation, and adsorption to sediment and humic materials. Low pH will increase the removal of aniline by adsorption; however, the adsorption to colloidal particles can extend the persistence of aniline in the aquatic environment. Although subject to oxidation when adsorbed to humic materials, aniline is resistant to hydrolysis. A half-life for aniline of 2.3 days has been reported in an industrial river. The presence of humic acids and various species of algae in the water can increase the photodegradation rates of aniline up to 50 fold.