Orcein (Orcein, archil, orchil, lacmus, litmus, orcein, orsin, litmus, E182) - makhiristo akuda. Amasintha mtundu kukhala wofiira m'malo a acidic ndi buluu mumtundu wa alkaline. Chemical formula C28H24N2O7.
Chowonjezeracho sichinaphatikizidwe pamndandanda wa "Zowonjezera Zakudya pakupanga chakudya" ku Malamulo ndi Malamulo a Sanitary and Epidemiological (SanPiN 2.3.2.2364-08) mu 2008.