Caustic Soda, or lye, is an alkali used in soap making. It is also known as sodium hydroxide and has the chemical formula of NaOH. Lye reactics with the fats in oils to produce an opaque or cloudy, hard soap. It is all consumed in the chemical reaction and none remains once soap is produced.
Always wear protective clothing when working with caustic soda
Avoid skin or eye contact
Avoid inhalation or ingestion
Can cause severe burns
If skin or eyes are contacted flush with water for 15 minutes
NB - This is not a food grade product and is not suitable for making food stuff.