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The page below is a sample from the LabCE course Troubleshooting Guidance for Hematoxylin and Eosin (H&E) Stain. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Components of Hematoxylin

Hematoxylin is a reasonably simple dye to make. The dye itself is extracted from the tree Hematoxylon campechianum.
Oxidation of the hematoxylin produces hematein, which is the actual dye used in an H&E stain. Addition of the mordant improves the ability of the hematein to attach to the anionic (negatively charged) components of the tissues.