Sepia (dye)
color code: # 704214
| Information on CI Natural Brown 9 | |
| CAS number | 77465-45-3 |
| EC number | 278-691-5 |
| ECHA ID | 100,071,516 |
| Wikidata | Q767608 |
Sepia ( CI Natural Brown 9) is a brown-to gray-black dye formed of the ink bag of squid ( cuttlefish , which is obtained) these as defensive secretions use. It was used to dye fabrics and as an ink for drawing. The color sepia (photography) is named after this dye .
Today sepia is mainly used to color food, especially pasta (black pasta, sepia) and in watercolor painting . The sepia pigment consists mainly of a gray-black melanin , which is produced from tyrosine via 3,4-dihydroxyphenylalanine ( dopa ), as well as traces of the yellow pigment sepiapterin . Melanin is a so-called heteropolymer , which is formed from dopaquinone, indole-5,6-quinone and indole-5,6-quinonecarboxylic acid in a ratio of 3: 2: 1. The weak medicinal effect of the dye, on the other hand, is based on the presence of the pteridine derivative sepiapterin.
Individual evidence
- ↑ a b Entry on Sepia. In: Römpp Online . Georg Thieme Verlag, accessed December 10, 2014.
- ↑ M. Bischoff, K. Velten, K. Sanders: Seafood - TEUBNER cooking course for connoisseurs. Graefe & Unzer Verlag, 2008, ISBN 3-8338-0769-5 , p. 48.
- ^ Lang, G .: Page no longer available , search in web archives: Chemistry of Personal Care Products - Cosmetic Chemistry 1, Part 4 (PDF; 8.1 MB) TU Darmstadt , lecture script
- ↑ Volker Dietz: The pharmacological influence of the sepiapterin-induced increase in cyclic [cyclic] guanosine monophosphate in human endothelial cells . Heidelberg 2003, DNB 969472862 (dissertation, University of Heidelberg ).