Is sodium fatty acid harmful to the skin?

Many people often come into contact with things with chemical ingredients in their lives. Although these do not cause much harm to the body, some people still worry about the impact on the body. Therefore, when people come into contact with sodium fatty acids, they are very worried about the harm to the skin. In fact, this kind of thing has many uses and its value is also very wide. Whether it is really harmful to the body remains to be studied.

Salting out of sodium of higher fatty acids

Molecular formula:RCOONa

Properties: General name for sodium salts of fatty acids. It is made by the reaction of sodium hydroxide and natural oils, using the soap boiling method or continuous saponification method. It can also be prepared by directly reacting fatty acids with sodium hydroxide. Its specific physical properties vary with the change of alkyl chain length. It is mainly used as soap, the so-called hard soap, and is mostly used as a household detergent.

characteristic

Saturated fatty acids

Melting point (sodium fatty acid) Characteristics of sodium soap

Lauric Aacid / Lauric Acid / C12:0 44~46 Good solubility in cold water, good resistance to hard water, strong foaming, stable foam, and poorer detergency than long-refined fatty acids. Hard soap can be obtained.

Myristic acid / Myristic acid / C14:0 58~60 Solubility in cold water is slightly worse than sodium laurate, good foaming properties, and detergency is worse than other long-refined fatty acids, but better than lauric acid. It can also produce hard soap

Palmitic acid / Palmitic acid / C16:0 63~65 Solubility in cold water becomes poor, and can be improved by increasing water temperature. Foaming property is poor, hard water resistance is poor, and detergency becomes better in warm or hot water. It can increase the hardness of soap.

Stearic acid / Stearic acid / C18:0 9~70 Poor solubility in cold water, poor resistance to hard water, poor foaming, and the best detergency among all fatty acid sodiums after dissolving in warm water or high water temperature. It can increase the hardness of soap.

Monounsaturated fatty acids

Characteristics of melting point sodium soap

Palmitoleic acid / Palmitoleic acid / C16:1 0 Compared with palmitic acid, because it contains a C=C double bond, it is more soluble in water than sodium palmitate.

Foaming and hard water resistance are also relatively improved, the detergency is good, and the irritation to the skin is low. The hardness becomes lower.

Oleic acid / Oleic acid / C18:1 13~14 Sodium stearate, because it contains a C=C double bond, its solubility in water and foaming power become better, its hard water resistance is also good, and its detergency is very good, even at medium and low water temperatures, so it must be used with other fatty acids. It has low irritation to the skin. But the hardness becomes lower.