saponifier
/səˈpɑnəˌfaɪər/
noun
- A substance that causes saponification, the process of turning fats or oils into soap.
- Without a strong saponifier, the fat will not turn into soap properly.
- The chemist added a saponifier to the mixture to turn the oils into soap.
- Lye is a common saponifier used in traditional soap making.