Does soap contain phenol? Can soaps containing benzyl alcohol be used? What are the hazards?

Medicated soap is made by adding an appropriate amount of phenol and cresol mixture (preservative, sterilization) or boric acid to soap. Other soaps are non-phenol-free.

Phenol is added to medicated soap, which has the effect of disinfection and sterilization, and ordinary soap is generally not added!

It seems that there is soap in underwear, but there is no soap in soap.

Soap. It is a general term for fatty acid metal salts, the number of fatty acid carbon in daily soap is generally 10-18, the metal is mainly alkali metals such as sodium or potassium, and there are also special purpose soaps made of ammonia and some organic alkalis such as ethanolamine and triethanolamine. Soaps include laundry soaps, toilet soaps, metal soaps, liquid soaps, as well as related products such as fatty acids, hardened oils, glycerin, etc.

In addition to high-grade fatty acid salts, soap also contains fillers such as rosin, water glass, spices, and dyes. Structurally, the molecule of sodium higher fatty acids contains a non-polar hydrophobic moiety (hydrocarbon group) and a polar hydrophilic moiety (carboxyl group). The hydrophobic base has lipophilic properties.

During washing, the grease in the dirt is stirred and dispersed into fine oil droplets, and when it comes into contact with the soap, the hydrophobic group (hydrocarbon group) of the sodium molecule of the higher fatty acid is inserted into the oil droplet, and the van der Waals force binds to the oil molecule. The hydrophilic group (carboxyl) part, which is easily soluble in water, extends out of the oil droplet and inserts into the water.

In this way, the oil droplets are surrounded by soap molecules, dispersed and suspended in water to form an emulsion, and then rinsed away with water after friction and vibration, which is the principle of soap decontamination. However, regular soap should not be used in hard or acidic water. In hard water, calcium and magnesium stearates that are insoluble in water are generated, and fatty acids that are insoluble in water are formed in acidic water, which greatly reduces their decontamination ability.

A small amount of phenol is mixed with medicated soap, which gives it a bactericidal effect.

The preparation method of medicated soap is the same as that of washing soap, and the qualified medicated soap is made of butter, coconut oil (or other grease) and a small amount of foaming agent, caustic soda and other raw materials, and added with the legal content of fungicide. In addition to the function of cleaning and decontamination, medicated soap also has the effect of sterilization. It is widely used in life and medicine.

The pharmaceutical ingredients added by the traditional medicinal soap are phenolic compounds, such as phenol, etc., this kind of medicinal soap is commonly known as lysu soap, which is similar to the composition of lysan water often used in hospitals, and phenolic compounds have a toxic and cidal effect on all living individuals. Because phenolic compounds often show a slight red color after oxidation, some of these medicinal soaps are simply made red.

The dilute aqueous solution of phenol can be used directly as an antiseptic and disinfectant. Cresol (methylphenol) is usually used in medicated soaps

The antibacterial effect of cresol is 3 10 times stronger than that of phenol, and the toxicity is almost the same, so the ** index is higher. It can kill bacterial propagules including mycobacteria. 2 solution can kill most of the pathogenic bacteria after 10 15 min, 2 5 solution can kill tuberculosis bacilli for 30 min.

Due to its low solubility in water, it is often prepared as a cresol soap solution (lysol). Cresol soap solution is easy to mix with water and is easy to use. Indications:

1 2 aqueous solution for hand and ** disinfection; 3 5 solution is used for disinfection of instruments and utensils; 5 10 solution is used for disinfection of excreta. Appearance: colorless or gray-brownish-yellow liquid, darkened in color when stored for a long time or exposed to sunlight, with phenolic odor.

soluble in water (1:50); It can be miscible with ethanol, chloroform, ether and glycerol; Highly soluble in fatty oils and volatile oils; Soluble in alkaline solution, aqueous solution of 2 is neutral.

(1) Phenol in soap ===> sodium phenol!

2) It has a sterilizing effect!

Phenol is toxic and can be sterilized in small amounts.

The so-called extra sprinkle my mind.

The ingredient added to the soap is within a strictly limited range, and theoretically there is no harm to the human body in a short period of time, so there is no need to worry. However, long-term use of soap may cause some ** problems.

If it is used to wash the face and bathe, it is not recommended to use soap and shower gel, as too many chemical ingredients are added, which is easy to form residues and clog pores, especially for girls. The soap will be dry after use, and the shower gel is too greasy and not refreshing, so it is recommended to use cold handmade soap.

Cold handmade soap, which is a very popular alternative to chemical products in recent years, is made of 100% natural materials. The composition of the material is very mild and contains very high natural nutrients of vegetable oil, all kinds of natural ingredients, herbs, etc., using the European traditional handmade manufacturing process, using the low-temperature method to retain the most complete nutritional value of the material, with pure water + vegetable oil method, through natural saponification reaction.

The best commercial brand of handmade soap is Camilla, and the folk is Yunze handmade soap.

Soap and shower gel contain chemical ingredients such as surfactants, flavors, preservatives, etc., which will cause **residue and cause some other ** problems when used for a long time.