LHand sanitizers are generally divided into two types: water-based and oil-based, according to their functions.
The main component of oil-based hand sanitizer is polyoxyethylene ether, etc. Although it has strong decontamination ability, it is more harmful to the skin than water-based hand sanitizer.
The general daily use is water-based hand sanitizer, the main component is surfactant, and a small part of the rest is various additives, such as chelating agent, moisturizing fat-filling agent, pH regulator, bactericide, solvent, thickener, fluorescent agent, etc. Agents, spices, foaming agents, etc., although the decontamination ability is weak, but the damage to the skin is very small.
The main functions of various ingredients are as follows:
Surfactants: Surfactants are widely used in detergents. Almost all washing products contain surfactants, which are the main decontamination ingredients of hand sanitizers. Generally speaking, there are three types of surfactants in hand sanitizers: anionic surfactants, such as lauryl alcohol, sodium 12 alkylbenzene sulfonate, etc.; cationic surfactants, such as 12 alkyl quaternary ammonium salts, etc.; neutral Surfactants, such as lauryl alcohol fatty ether, etc. In hand sanitizer, the amount of surfactant added is between 10% and 30%.
Chelating agent: for chelating metal ions in water, sodium citrate is used more, and the addition amount is about 1%.
Preservatives: Sodium benzoate, Kaithon, and potassium sorbate are generally used, and the addition amount is about 0.1%.
Moisturizing and refatting agent: After using the surfactant, although the dirt on the hands is removed, the oil on the hands is also removed at the same time. Therefore, moisturizing and fat-extracting agents are added to moisturize and moisturize the skin to prevent dryness and cracking of the skin. Commonly used are glycerin, polyethylene glycol, and cocoglycerin, and the addition amount is about 1%.
pH regulator: mainly to adjust the pH of the hand sanitizer to a stable state that is closer to the pH of human skin, such as citric acid.
Bactericides: mainly for the purpose of having a certain antibacterial effect after using hand sanitizers. Triclosan, polyhexamethyleneguanidine, and octadecyltrimethylammonium chloride are commonly used, and the addition amount does not exceed 1%.
Thickener: To make the hand sanitizer thicker, mainly for the feel and appearance, the addition amount is about 1%, and sodium chloride is generally used.
Solvents: benzyl alcohol, ethylene glycol phenyl ether, 1.2-propanediol, and isopropanol are commonly used, and the addition amount is 2%-6%.
Others such as fluorescent agents, flavors, foaming agents, etc. are for the appearance of the product. Not only hand sanitizers, but most of the cleaning products have basically the same appearance before adding various additives, like dirty water. After adding additives, consumers will see the appearance, which is sticky, white and smooth.