A reddish-brown crystalline dye obtained from logwood and used as a stain and indicator.
Chemical formula C₁₆H₁₂O₆
Example sentencesExamples
- The extract from the heartwood is not a dye until it undergoes oxidation into hematein, which is an acid chromogen.
- The yellow color of glycogen is difficult to explain, but it may be due to unmordanted hematein.
- Commercial extract of logwood extracted from the wood by boiling water contains both hematoxylin and hematein.
- Both hematoxylin and hematein are still commonly used for bacteriological and histological stains.
- This is the HCK S grade of hematein, manufactured to specific values for this important use.