Tags: Chemical Compound, Chemical Substance.
Haematoxylin hematoxylin Natural Black 1 or C.I. 75290 is extracted from the heartwood of the logwood tree. When oxidized it forms haematein a compound that forms strongly coloured complexes with certain metal ions the most notable ones being Fe(III) and Al(III) salts. Metal-haematein complexes are used to stain cell nuclei prior to examination under a microscope.
