Butan-1-ol is expected to be more soluble in water than butan-1-amine because alcohols form stronger intermolecular hydrogen bonds with water compared to amines.

Amines and alcohols with nitrogen and oxygen having electronegativities of 3.0 and 3.5, respectively, exhibit different solubility patterns in water, with alcohols generally being more soluble.

Lower aliphatic amines are soluble in water due to the ability to form hydrogen bonds with water molecules. However, solubility decreases with increasing molar mass of amines because of the larger hydrophobic alkyl part.

Arylamines such as aniline are usually colorless but develop color upon storage due to atmospheric oxidation.

Lower aliphatic amines are typically gases with a fishy odor. Primary amines with three or more carbon atoms exist as liquids, while higher ones are solid.