iron hematoxylin

i·ron he·ma·tox·y·lin

unique ferric lakes of hematein that produce deep blue-black stains; useful for studies of cytologic detail, such as chromosomes, spindle fibers, Golgi apparatus, myofibrils, and mitochrondria; also useful to demonstrate Entamoeba histolytica.
See also: Heidenhain iron hematoxylin stain, Weigert iron hematoxylin stain.