- Source: Sodium tallowate
Sodium tallowate is made from sodium hydroxide (a.k.a., caustic soda, or, lye); steam; and, animal (often, cattle) fat (i.e., tallow). This process, called saponification, breaks down the triglyceride (fat); frees the glycerol within; and, results in a sodium salt, sodium tallowate. It is usually combined with sodium cocoate, the sodium salt of coconut oil. Together, they are—with sodium palmate—major constituents of bar soap.
See also
Sodium palmitate
Sodium stearate
International Nomenclature of Cosmetic Ingredients