A certain concentrated dish soap has three patented formulas - glyceryl moisturizing factor, glyceryl moisturizing factor + fatty alcohol polyether, and glyceryl moisturizing factor + fruit acid. Main chemical ingredients: Fluorescent whitening agent (fluorescent whitening agent is mainly used to whiten synthetic laundry detergents, rayon, etc.). It is used in dishwashing liquid to make tableware have a bright effect. However, because fluorescent whitening agent may It is harmful to human health, including the stomach and intestines. Relevant regulations state that dishwashing liquid cannot contain this chemical substance). Methanol (a toxic chemical, colorless, transparent, and toxic, is found in the ingredients of dishwashing liquid. It is related to the formula of the product. According to standards, the methanol content per gram of dishwashing liquid must be less than or equal to 1 mg) and formaldehyde (if ingested in large amounts, formaldehyde can damage the human gastrointestinal tract and even cause poisoning). In addition, the pH value of the product was also tested. This item is an indicator that reflects whether the product is harmful to the user's skin (generally speaking, a pH value of 7 is neutral, and the pH value of human skin is about 5 to 7. , the pH value of most samples is quite close to neutral.