Orcein
Also known as: Archil, Orchil, Lacmus, C.I. Natural Red 28
Colorants
Safety rating
Avoid
Eat Away!Generally SafeUse SparinglyAvoid
Purpose and Function
Orcein is a natural dye derived from lichens, historically used to impart a reddish-brown hue to food, though its food use has been largely discontinued. It remains valued in biological staining (chromosomes, elastic fibers) and has historically been used as a textile dye.
Commonly found in
- —Formerly: reddish-brown food coloring (discontinued)
- —Biological/histological staining (non-food use)
Key functions
- —Formerly provided reddish-brown food coloring
- —Used as a laboratory staining agent
Potential Risks and Side Effects
- 01Raised toxicity concerns when consumed, leading to its phase-out as a food colorant
- 02Banned as a food additive in the EU and US
- 03Rare allergic reactions in non-food (textile, cosmetic) applications