Erythrosine, also known as E127, is a synthetic red dye commonly used in food products, cosmetics, and pharmaceuticals. It is derived from fluorescein and is known for its bright pink color. Erythrosine is often found in items like candies, drinks, and baked goods, where it enhances visual appeal. In addition to its use in food, erythrosine is also utilized in biological staining and microscopy. It can help highlight specific structures in cells and tissues, making it valuable in scientific research. However, its safety has been debated, leading to regulations in various countries regarding its use.