:Rhodoxanthin

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 406901980

| Reference =Merck Index, 11th Edition, 8196.

| ImageFile =Rhodoxanthin.png

| ImageSize =250px

| IUPACName = (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

| OtherNames ={{Unbulleted list|4',5'-Didehydro-retro-β-carotene-3,3'-dione|E161f}}

|Section1={{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|??}}

| CASNo =116-30-3

| UNII_Ref = {{fdacite|changed|FDA}}

| UNII = 51V984ID9Q

| PubChem =5281251

| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}

| ChemSpiderID = 4444663

| SMILES = CC\1=CC(=O)CC(/C1=C\C=C(\C=C\C=C(\C=C\C=C\C(=C\C=C\C(=C\C=C\2/C(CC(=O)C=C2C)(C)C)\C)\C)/C)/C)(C)C

| InChI = 1/C40H50O2/c1-29(17-13-19-31(3)21-23-37-33(5)25-35(41)27-39(37,7)8)15-11-12-16-30(2)18-14-20-32(4)22-24-38-34(6)26-36(42)28-40(38,9)10/h11-26H,27-28H2,1-10H3/b15-11+,16-12+,19-13+,20-14+,29-17+,30-18+,31-21+,32-22+,37-23-,38-24-

| InChIKey = VWXMLZQUDPCJPL-ZDHAIZATBA

| StdInChI_Ref = {{stdinchicite|changed|chemspider}}

| StdInChI = 1S/C40H50O2/c1-29(17-13-19-31(3)21-23-37-33(5)25-35(41)27-39(37,7)8)15-11-12-16-30(2)18-14-20-32(4)22-24-38-34(6)26-36(42)28-40(38,9)10/h11-26H,27-28H2,1-10H3/b15-11+,16-12+,19-13+,20-14+,29-17+,30-18+,31-21+,32-22+,37-23-,38-24-

| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}

| StdInChIKey = VWXMLZQUDPCJPL-ZDHAIZATSA-N

| RTECS =

| MeSHName =

| ChEBI =

| KEGG_Ref = {{keggcite|changed|kegg}}

| KEGG = C08610

}}

|Section2={{Chembox Properties

| Formula =C₄₀H₅₀O₂

| MolarMass =562.82 g/mol

| Appearance =Purple crystals

| Density =

| MeltingPtC = 219

| BoilingPt =

| Solubility =

}}

|Section3={{Chembox Hazards

| MainHazards =

| FlashPt =

| AutoignitionPt =

}}

}}

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. As a food additive it is used under the E number E161f as a food coloring. It is not approved for use in the EUUK Food Standards Agency: {{cite web |url=http://www.food.gov.uk/safereating/chemsafe/additivesbranch/enumberlist |title=Current EU approved additives and their E Numbers |accessdate=2011-10-27}} or US; however, it is approved in Australia and New ZealandAustralia New Zealand Food Standards Code{{cite web |url=http://www.comlaw.gov.au/Details/F2011C00827 |title=Standard 1.2.4 - Labelling of ingredients |date=8 September 2011 |accessdate=2011-10-27}} (where it is listed under its INS number 161f).