The chemical name for the red dyes extracted from several lichens of the genera Evernia, Roccella, Ramalina and Lecanoria, such as Evernia prunastri, Roccella phycopsis and Ramalina scopulorum.
Synonyms and Related Terms
CI Natural Red 28; archil; orchil; lacmus;
- ThermoFisher: SDS
Physical and Chemical Properties
Orcein is soluble in ethanol. It is an indicator dye that turns blue in alkaline solutions.