Rhodoxanthin

Rhodoxanthin is a xanthophyll pigment with a purple color that is found in small quantities in a variety of plants including Taxus baccata and Lonicera morrowii. It is also found in the feathers of some birds.[1] As a food additive it is used under the E number E161f as a food coloring. It is not approved for use in the EU[2] or US; however, it is approved in Australia and New Zealand[3] (where it is listed under its INS number 161f).

Rhodoxanthin[1]
Names
IUPAC name
(4E)-3,5,5-Trimethyl-4-[(2E,4E,6E,8E,10E,12E,14E,16E,18E)-3,7,12,16-Tetramethyl-18-(2,6,6-trimethyl-4-oxo-1-cyclohex-2-enylidene)octadeca-2,4,6,8,10,12,14,16-octaenylidene]-1-cyclohex-2-enone
Other names
•4',5'-Didehydro-retro-β-carotene-3,3'-dione
•E161f
Identifiers
3D model (JSmol)
ChemSpider
E number E161f (colours)
KEGG
UNII
Properties
C40H50O2
Molar mass 562.82 g/mol
Appearance Purple crystals
Melting point 219 °C (426 °F; 492 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

References
  1. Merck Index, 11th Edition, 8196.
  2. UK Food Standards Agency: "Current EU approved additives and their E Numbers". Retrieved 2011-10-27.
  3. Australia New Zealand Food Standards Code"Standard 1.2.4 - Labelling of ingredients". Retrieved 2011-10-27.
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