logwood

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logwood

dye

Also known as: haematoxylin

Learn about this topic in these articles:

derivation from logwood

In logwood
Logwood was once an important source of black dye, which is obtained from the red heartwood and is still used as a source of the histological stain hematoxylin. The plant is also used in certain traditional systems of medicine.
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use as natural dye

In dye: Natural dyes
Logwood is the only natural dye used today. Heartwood extracts of the logwood tree, Haematoxylon campechianum, yield hematoxylin, which oxidizes to hematein during isolation. The latter is red but in combination with chromium gives shades of charcoal, gray, and black; it is used mainly to…
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