Sodium Hydroxide Is One Of The Raw Materials Of Handmade Soap

As is well-known, sodium hydroxide is strong alkaline which is harmful to the skin. But when saponified with oil and water, it is no longer sodium hydroxide, but soap and glycerin. The production of the handmade soap in life also needs sodium hydroxide. Many people may ask if handmade soap use sodium hydroxide, why it still call pure natural product? Is it safe to use? The following I will give you a brief introduction of the process of handmade soap production. Saponification is the reaction that the strong alkaline and ester react and generate alcohols and carboxylate. In the narrow sense, saponification is limited to the combination of grease and strong alkaline (sodium hydroxide and potassium hydroxide), resulting in the higher fatty acid sodium salt and glycerin, which is a step in the process of making soap, hence the name is from it. The saponification equation is as follows:

CH2OCO-R
|
CHOCO-R     + 3NaOH → 3R-COONa + CH2OH-CHOH-CH2OH
|
CH2OCO-R

Can saponification reaction have residual sodium hydroxide? To make sure there’s no residual sodium hydroxide, the handmade soap must place 1 to 2 months after reaction. And even if there’s a little of free sodium hydroxide after the reaction, after a period of time, it can be reduced to alkalescence. So the soap of complete saponification won’t hurt the skin. The final product of saponification is fat, sodium acid and glycerin in theory, the glycerin of saponification is retained. It is the important substance of skin moisture, which is also one of the reasons why handmade soap is called pure natural soap.

Why do we feel dry when we wash our face with the soap from the supermarket? Most industrial soaps will extract glycerine, which is used to make other skin care products or industrial supplies. The soap is without the natural skin-care ingredient glycerin, and contains many artificial additives that can cause discomfort.

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