Description
Hematoxylin (C.I. 75290), for microscopy, Molar mass (M) 302,29 g/mol, CAS No. 517-28-2, EC No. 208-237-3, Empirical formula C16H14O6
A beige natural dye which achieves its active form, the hemalum, by oxidation (e.g. with sodium iodate) and treating with a metallic mordant (e.g. alum). Hemalum lakes stain cell nuclei blue.