Introduction of several preservatives commonly used in daily chemicals:
Methylisothiazolone (MIT) is a chlorine-free preservative that inhibits the growth of bacteria, fungi and mold. MIT is effective in the sterilization of a wide range of bacteria at low concentrations. It is especially suitable for the preservation of cosmetic and personal care preparations. It is therefore widely used as a highly effective preservative in cosmetics and personal care products. In 2004, the European Union Committee on Cosmetics and Non-Food Science (now the Committee on Consumer Safety) provided MIT as a preservative that can be used in staying and rinse-off cosmetics with a maximum concentration of 0.01%.
Phenoxyethanol, also known as phenoxyethanol, is a common preservative in cosmetics and is generally present in cosmetics at concentrations ranging from 0.5% to 1%. Phenoxyethanol is toxic at moderate concentrations and affects the brain and nervous system. The US Food and Drug Administration has warned that phenoxyethanol may inhibit the central nervous system, causing vomiting, diarrhea, and dehydration in infants. Japan's cosmetics regulate its use concentration limit. The EPA (Environmental Protection Agency) data sheet shows that phenoxyethanol causes chromosomal changes and gene mutations, as well as testicular atrophy, and remains in the body to interfere with the reproductive system. Daily necessities containing phenoxyethanol include: skin care products, shower gels, perfumes, face creams, lipsticks, children's daily necessities, wet wipes, eye drops, invisible eye care solutions, and the like.
Para-hydroxy-formate is a preservative used in cosmetics and pharmaceuticals, and is sometimes used as a food additive. Hydroxybenzoic acid esters have the effect of estrogen, and long-term use in large doses may pose a risk of breast cancer.
In cosmetics, because a large amount of nutrients are added, it is easy to create conditions for the reproduction of microorganisms. Therefore, a certain amount of preservative is added to the cosmetics to prevent the microbes from causing cosmetic spoilage, thereby prolonging the shelf life. China's cosmetics hygiene regulations stipulate that the maximum limit of the monoester of the paraben preservative in cosmetics is 0.4%, and the mixed ester is 0.8%. It has been reported that excessive use of parabens in cosmetics can cause contact dermatitis.
