Difference between revisions of "Hematein"
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==Properties== | ==Properties== | ||
===Chemical=== | ===Chemical=== | ||
| − | Hematein makes various complexes with metal ions. Aluminum(III) ions produce a dark blue color, | + | Hematein makes various complexes with metal ions. Aluminum(III) ions produce a dark blue color, copper(II) ions produce a violet color, and ferric ions produce a dark blue to black complex. |
===Physical=== | ===Physical=== | ||
| Line 131: | Line 131: | ||
===Storage=== | ===Storage=== | ||
| − | + | Hematein is best kept in closed bottles. | |
===Disposal=== | ===Disposal=== | ||
Revision as of 20:08, 9 November 2018
| Names | |
|---|---|
| IUPAC name
3,4,6a,10-Tetrahydroxy-6,7-dihydroindeno[2,1-c]chromen-9-one
| |
| Other names
Haematein
Hematine Hydroxybrazilein NSC7333 | |
| Properties | |
| C16H12O6 | |
| Molar mass | 300.27 g/mol |
| Appearance | Dark brown powder |
| Odor | Odorless |
| Melting point | 140 °C (284 °F; 413 K) |
| Boiling point | Decomposes |
| Poorly soluble | |
| Hazards | |
| Safety data sheet | Sigma-Aldrich |
| Related compounds | |
| Related compounds
|
Haematoxylin |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Hematein, or, sometimes, Haematein, is derived from Haematoxylin, and is a biological stain component. Its natural source is from logwood, under such name both hematein and Haematoxylin are referred to. Hematein has indicator properties, and complexes with metal ions to form Nucleic Acid stains.
Contents
Properties
Chemical
Hematein makes various complexes with metal ions. Aluminum(III) ions produce a dark blue color, copper(II) ions produce a violet color, and ferric ions produce a dark blue to black complex.
Physical
Hematein is a dark brown-red solid, usually sold as as a fluffy powder. It often contains traces of Haematoxylin. It does not dissolve easily in water unless the solution is acidic, but excessively acidic solutions decompose the compound.
Availability
Although rather expensive, the dye precursor, Haematoxylin, can be bought from such sources as Onyxmet. This may then be gently oxidized to Hematein.
Preparation
Oxydizing Haematoxylin will yeild Hematein.
Projects
- Production of stain complexes for nucleic acids in animal cells.
Handling
Safety
Other than staining skin and clothing, this compound can be considered harmless.
Storage
Hematein is best kept in closed bottles.
Disposal
No special disposal is required.
