Ruby litol VK (Pigment Rubine, Lithol Rubine BK, E180) is a red synthetic dye.
Red powder, poorly soluble in hot water, does not dissolve in cold water. Chemical formula C18H12CaN2O6S.
It is used for coloring plastics and textiles, paints, printer inks (standard magenta).
In the food industry, it is added to cheeses to color the crust.
Banned in some countries.