The difference between sodium hydride and sodium hydroxide in soap

Sodium hydroxide is the raw material for making solid handmade soap, also known as caustic soda or caustic soda. It is a highly corrosive alkali with a pH as high as 14, which is dangerous. If it is accidentally contaminated on the skin, it may be red, swollen and stinging.

The reason why such a strong alkali is chosen to make handmade soap is because the quality of soap made from it is better.

The purpose of adding sodium chloride is to precipitate sodium fatty acid in soap. In fact, it takes advantage of the difference in solubility. The solubility of sodium chloride is greater than that of sodium fatty acid. After adding sodium chloride, the concentration of sodium ions in the solution increases, which leads to the precipitation of sodium fatty acid, which can be understood to be related to the solubility product.

Sodium chloride is better. Sodium hydroxide is alkaline, which is corrosive to the skin after long-term use.