Tartrazine is a synthetic yellow dye commonly used in food products, beverages, and cosmetics. It is known for its bright yellow color and is often found in items like candies, soft drinks, and processed foods. The dye is identified by its E number, E102, in the European Union. While Tartrazine is generally recognized as safe, some individuals may experience allergic reactions or sensitivities, leading to symptoms like hives or asthma. Due to these potential reactions, products containing Tartrazine are required to include labeling, especially in regions like the EU and the United States.