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Kantaksantin

Kantaksantin[1]
Imena
IUPAC ime
β,β-karoten-4,4'-dien
Identifikatorji
3D model (JSmol)
ECHA InfoCard 100.007.444
Število E E161g (barvila)
  • O=C2CCC(C)(C)C(/C=CC(\C)=C\C=C\C(\C)=C\C=C\C=C(/C)\C=C\C=C(/C)\C=C\C1=C(C)C(=O)CCC1(C)C)=C2C
Lastnosti
C40H52O2
Molska masa 564.82 g/mol
Videz vijolični kristalčki
Tališče 217 °C
Če ni navedeno drugače, podatki veljajo za material v standardnem stanju pri 25 °C, 100 kPa).
Sklici infopolja
Kantaksantin je prisoten v naravi in daje barve nekaterim organizmom, kot je severni kardinal (Cardinalis cardinalis).

Kantaksantin je karotenoidni pigment, ki je široko razširjen v naravi. Kemična formula kantaksantina je C40H52O2.[2] Število E spojine je E161g.

Sprva je bil izoliran iz užitnih gob, pozneje pa tudi iz zelenih alg, bakterij, rakov, ptic in rib, kot so krapi in špari.[2]

Kantaksantin kot aditiv

[uredi | uredi kodo]

V Združenem kraljestvu zakon dovoljuje uporabo spojine kot aditiv v klobasah ter v krmi postrvi, perutnine in lososov.[3][4] Največja dovoljena količina v državah Evropske unije je 80 mg/kg.[2]

Medicinski pomen

[uredi | uredi kodo]

Zaužit v prevelikih količinah (npr. v tabletkah za samoporjavitev) se lahko kopiči v podkožnem maščevju in povzroči zlato-oranžno obarvanje kože.[5] Preveliki odmerki so povezani tudi s t. i. kantaksantinsko retinopatijo (nastanek rumenih depozitov na mrežnici), poškodbami jeter ter s koprivnico (urtikarija).[6]

Opombe in sklici

[uredi | uredi kodo]
  1. Merck Index, 11. izdaja, 1756.
  2. Canthaxanthin - your questions answered Arhivirano 2007-06-09 na Wayback Machine. - June 13, 2002
  3. Uredba Komisije (ES) o določitvi mejnih vrednosti ostankov za krmni dodatek kantaksantin. EUR-Lex. Pridobljeno 07.11.2009.
  4. James, W.; Berger, T.; Elston, D. (2005). Andrews' Diseases of the Skin: Clinical Dermatology (10 izd.). Saunders. ISBN 0721629210.
  5. FDA & You 3. izdaja - pomlad/poletje 2003
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Kantaksantin
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