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Sodium hydroxide is an essential component in the production of soap; it combines with the natural oils and butters to produce a new substance during the saponification process, turning the liquid oils into a solid soap bar. Saponification is the chemical reaction that occurs when oils and butters are combined with sodium hydroxide to create a completely new material (soap). This means there is no sodium hydroxide left in the soap after the saponification process, just creamy, bubbly, hydrating goodness for your skin. 

Found in All Body and Face Bars