# Why are amines soluble in water?

The nitrogen centre is of course a basic site, which possesses a formal lone pair. Primary amines should have considerable solubility in water on this basis. As the hydrocarbyl chain grows longer, and hydrocarbyl substitution increases (i.e. 1""^@ to 2""^@ to 3""^@, basicity should increase but water solubility should decrease inasmuch as carbon chain-carbon chain interactions should become more significant and stronger).