Indanthrene Blue RS
Also known as: C.I. Vat Blue 4
Colorants
Safety rating
Avoid
Eat Away!Generally SafeUse SparinglyAvoid
Purpose and Function
Indanthrene Blue RS was a synthetic blue dye historically used in confectionery, beverages, and processed foods. It is no longer approved for food use in most countries.
Commonly found in
- —Historically: candies, soft drinks, and baked goods (now banned in the US and EU)
Key functions
- —Formerly provided a vibrant blue color
Potential Risks and Side Effects
- 01Evidence of carcinogenic effects when consumed in large amounts or over extended periods
- 02Can cause allergic reactions — skin rashes, respiratory issues, or gastrointestinal discomfort
- 03Banned as a food additive in the United States and European Union