Hematein
Hematein, or, sometimes, Haematein, is derived from Haematoxylin, and is a biological stain component. Its natural source is from logwood, under such name both hematein and Haematoxylin are referred to. Hematein has indicator properties, and complexes with metal ions to form Nucleic Acid stains.
Contents
Properties
Chemical
Hematein makes various complexes with metal ions. Aluminum(III) ions produce a dark blue color, Copper(II) ions produce a violet color, and Ferric ions produce a dark blue to black complex.
Physical
Hematein is a dark brown-red solid, usually sold as as a fluffy powder. It often contains traces of Haematoxylin. It does not dissolve easily in water unless the solution is acidic, but excessively acidic solutions decompose the compound.
Availability
Although rather expensive, the dye precursor, Haematoxylin, can be bought from such sources as Onyxmet. This may then be gently oxidized to Hematein.
Projects
Production of stain complexes for nucleic acids in animal cells.
Safety
Other than staining skin and clothing, this compound can be considered harmless.
