Food grade sodium hydroxide / Lye. Used for soap or biodiesel when the quality of the caustic is very critical. Also use if: you have been having problems with the consistency of batches, formulate with hard to saponify oil blends, or employ sensitive essential oils. This grade is also Food Codex, FCC, and Kosher certified, with a Certificate of Analysis included. Can be used for Pretzels, Olives, Lutefisk,
Lye (sodium hydroxide) is a corrosive material used in making soap, some food products, in fuel cells, and in making bio diesel fuel.
Food grade has a lower part per million of heavy metal impurities. It is also used in the creation of many very healthy foods.