Like alcohols, fatty acids are molecules that have lots of hydrogen and carbon atoms, and a small amount of oxygen (in their case two oxygen atoms, rather than one).

Hair conditioning industry has largely developed since then, and hair care products began to include ammonium compounds, silicon, fatty alcohols, and so on.

The process of catalytic amination of fatty alcohols is the main method to produce tertiary amines and has obvious advantages compared with the conventional process of fatty acids.