Carmoisine（Cat No.:R017221）, also known as Azorubine or E122, is a synthetic red azo dye commonly used as a food colorant in beverages, confectionery, and baked goods. It provides a vibrant red hue and is favored for its stability under heat and light. While approved in many countries, its use is regulated due to potential hypersensitivity reactions, particularly in individuals with aspirin intolerance or asthma. Carmoisine is also utilized in cosmetics and pharmaceuticals. In research, it serves as a reference compound in toxicology, food safety, and dye chemistry studies.