Logwood Extract (Haematein) CAS#475-25-2

Natural origin and eco-friendly – Hematoxylin extract is derived from natural sources, providing a sustainable and environmentally friendly precursor for dye production.
Convertible to active dye – It can be easily oxidized to hematoxylin, making it a versatile starting material for high-quality dyes.
Reliable oxidized form – Hematoxylin oxide, the oxidation product, offers a stable and consistent compound for further chemical applications.
Responsive in aqueous environments – It is readily oxidized in aqueous solutions, especially under alkaline conditions, allowing for controlled chemical reactions and predictable performance.

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Product Details

Logwood Extract (Haematein) #475-25-2

Hematoxylin extract, also known as oxidized hematoxylin, is a natural dye precursor that can be further oxidized to produce hematoxylin. Its oxidation product, hematoxylin oxide, provides a stable and reliable form of the compound. In aqueous solutions—particularly under alkaline conditions—it is readily oxidized by exposure to air, allowing controlled chemical reactions.

Logwood Extract (Haematein) CAS#475-25-2

HEMATEIN Chemical Properties

Melting point	180 °C
Boiling point	361.5°C (rough estimate)
density	1.2766 (rough estimate)
refractive index	1.4600 (estimate)
storage temp.	2-8°C
solubility	Methanol (Slightly)
form	Crystalline Powder
Colour Index	75290
pka	8.02±0.40(Predicted)
color	Dark brown
Water Solubility	0.6g/L(20 ºC)
Merck	134651
BRN	93039
LogP	0.560 (est)
EPA Substance Registry System	Benz[b]indeno[1,2-d]pyran-9(6H)-one, 6a,7-dihydro-3,4,6a,10-tetrahydroxy- (475-25-2)
Safety Statements	24/25
WGK Germany	3
RTECS	DE3120000
F	39744
HS Code	32030010

Product Usage

Logwood Extract (Haematein) offers versatile applications. In the textile industry, it serves as a natural dye suitable for wool and silk, producing a range of shades from bright purple to deep black depending on the mordant used. In laboratory settings, the oxidized hematoxylin it contains can form colored complexes with metal ions. It is commonly used in combination with eosin for H&E staining, aiding in the detailed observation and analysis of cell structures.

Logwood Extract (Haematein) CAS#475-25-2