Logwood Haematoxylon

Other important natural dyes are obtained from the heartwood of several species of leguminous trees. Logwood Haematoxylon campechianum) is a small, thorny tree native to Central America that is an important source of a dye known as hematoxylin, which has a deep, purple-red color, and can also be manufactured into a persistent black dye. The brazilette H. brasiletto) is a source of a natural red dye as are brazilwood Caesalpina brasiliensis) and sappanwood (C. sappan) of south Asia. 

HjEMATOXYLON. Logwood. Haematoxylon campechianum. W. II. 547. Lignum. The wood. 

H 4.67%, O 31.76%. From the heart-wood of logwood (Haematoxylon campechianum Linn., Leguminosae) Chev-reul, Ann. Chim. Phys. 82, 54, 126 (1810). Structure Perkin, Robinson, J. Chem. Soc. 93, 489 (1908). Synthesis Dann, Hofmann, Angew, Chem, 75, 1125 (1963) Morsingh, Robinson, Tetrahedron 26, 281 (1970) Kirkiacharian, Billet, Bull. Soc. Chim. France 1972, 3292. Review Robinson, ibid. 1958, 125. Stereochemistry Craig et ah, J. Org. Chem. 30, 1573 (1965). 

Cl 75130. See Carotene Cl 75135. See Violoxanthin Cl 75170. See Guanine Cl 75290. See Logwood (Haematoxylon campechianum) extract Cl 75300. See Curcumin Turmeric (Curcuma longa)... 

HA. See Hydroquinone monomethyl ether Haarlem oil. See Cade oil Haematoxylin. See Hematoxylin Haematoxylon campechianum Haematoxylon campechianum extract. See Logwood (Haematoxylon campechianum) extract Hairactive . See Hydrolyzed lupine protein Hairfix. See... 

Laurylpyridinium chloride Linoleamidopropyl PG-dimonium chloride phosphate Logwood (Haematoxylon campechianum) extract MDM hydantoin MEA-iodine Methylbenzethonium chloride ... 

Logwood (Haematoxylon campechianum) extract 232-341-8 Basic violet 1 232-347-0... 

Logwood (Haematoxylon campechianum, Leguminosae) of tropical America was exported from about the middle of the 16th century. Subsequently, the wood extracts were also exported. In the latter half of the 19th century, the annual exports of the wood exceeded 100,000 tons. The major component of the extractives, namely hematoxylin, when oxidized, forms the dye hematin, which produces blue to black colors depending on the mordant of iron or copper salts or potassium dichromate. 

Logwood The very hard brown or brownish-red wood of a central American trea (Haematoxylon campechlanum). It contains the coloring principal haematoxylin used In staining cells for microscopy. 

CAS 8005-33-2 EINECS/ELINCS 232-337-6 Synonyms Cl 75290 Haematoxylon campechianum Haematoxylon campechianum extract Logwood extract... 

Logwood extract—A reddish brown-to-black solid material extracted from the heart-wood of the leguminous tree Haematoxylon campechianum. The active colorant substance is principally hematein. The latent coloring material is the unoxidized or leuco form of hematein called hematoxylin. The leuco form is oxidized by air. 

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