E133, also known as Brilliant Blue FCF, is a synthetic food colorant commonly used in various food products, beverages, and cosmetics. It provides a vibrant blue hue and is often found in items like candies, soft drinks, and ice creams. E133 is approved for use in many countries, including those in the European Union and the United States. This colorant is derived from coal tar and is classified as a dye. While it is generally considered safe for consumption, some individuals may experience allergic reactions. Regulatory agencies monitor its use to ensure it meets safety standards for public health.