Classification of lipids
The term saponifiable refers to the ability of these lipids to form soaps.
The lipids are classified into three groups:
- Fatty acids.
- Saponifiable lipids. They have ester bonds (-COOR-) that produce soaps byalkaline hydrolysis (Ex. NaOH). They contain fatty acids in their molecular composition. They include acylglycerides (or fats), waxes, and complex lipids (phospholipids and glycolipids).
- Unsaponifiable lipids. They do not have ester bonds. In its composition they do not have fatty acids. They comprise the following groups: terpenes, steoroids, and the prostaglandins.