Luteolin
Revision as of 12:21, 27 April 2013 by (username removed)
Description
The principal yellow colorant in the dye dye weld. Luteolin is a flavone type dye. It is extracted in a hot alkaline solution made with boiling water and potash. Depending on the mordant, weld produces colors ranging from bright yellow (tin) to gold (aluminum) to green (iron).
Synonyms and Related Terms
weld; 5,7,3',4' tetrahydroxyflavone (IUPAC); luteolina (Esp., Port.)
Other Properties
Needle-like crystals.
Soluble in ethanol and alkaline solutions. Slightly soluble in water.
| Composition | C15H10O6 |
|---|---|
| CAS | 490-70-3 |
| Molecular Weight | mol. wt. = 286.24 |
Authority
- External source or communication, External source or communication Comment: Contributed information: Cindy Connelly Ryan, August 2007, IUPAC name
- Ralph Mayer, Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 5641
- The Dictionary of Art, Grove's Dictionaries Inc., New York, 1996 Comment: 'Pigments'
- External source or communication, External source or communication Comment: Contributed information: Cindy Connelly Ryan, August 2007, IUPAC name