With the improvement of living standards, satiety is no longer a "big thing" to worry about. People pay more and more attention to the health and safety of eating. With the development of the chemical industry, in order to improve the color and taste of food, more food additives have been developed. However, not all colorants can be added to food. Some of them are very harmful to human health. I think we will not be unfamiliar with Sudan red, which can be described as "talking about red change". In fact, in addition to Sudan red, another red dye rhodamine B is also an additive prohibited from being added to food.

    SoRhodamine BWhat is it? Rhodamine B, also known as rose red B, or alkaline rose essence, commonly known as flower pink, is a synthetic dye with bright peach color. Rhodamine B was found to cause subcutaneous sarcomas in mice and is suspected to be a carcinogen. Rhodamine B has strong fluorescence in solution and is used as a cell fluorescence dye, colored glass, characteristic fireworks and other industries in the laboratory. It is also commonly used for dyeing silk, acrylic fiber and wool. Its light fastness can reach grade 2-3. It is used for mordant dyeing of cotton fiber with tannin, and its light fastness is poor. It is also used for coloring leather, paper, wheat straw and preparing lake pigments. It is mainly used in the paper industry to dye wax paper, typewriting paper, glossy paper, etc; It reacts with Phosphotungsten molybdic acid to form a lake, which is used to make paints, pictures and other pigments; It can also be used for dyeing acrylic, hemp, silk and other fabrics as well as wheat straw and leather products.

    Because rhodamine B has the characteristics of low price, red color and strong stability, it is often used by illegal businesses as a colorant to replace food additives. Sudan red is used in edible agricultural products. After eating, it leads to sarcoma in human subcutaneous tissue, with carcinogenicity and mutagenicity, which brings great hidden dangers to people's food safety. In 2008, China included it in the first batch of "list of non edible substances that may be illegally added to food and food additives that are prone to abuse", which clearly stipulates that it is not allowed to be used as food additives and food coloring.