Astaxanthin Esters
Astaxanthin esters;
Astaxanthin fatty acid esters;
Fatty acid esters of (3S,3′S)-3,3′-dihydroxy-β,β-carotene-4,4′-dione.
Astaxanthin fatty acid esters;
Fatty acid esters of (3S,3′S)-3,3′-dihydroxy-β,β-carotene-4,4′-dione.
DEFINITION
Astaxanthin Esters is obtained by extraction with either supercritical carbon dioxide or acetone from cultures of Haematococcus pluvialis. It consists mainly of 3S,3′S stereoisomers of astaxanthin in the monoester, diester, and free forms. The monoester form is the most abundant, followed by the diester form. The free form is a minor component. Suitable antioxidants may be added. It contains NLT 5% of total astaxanthin, calculated as free astaxanthin on the anhydrous basis.
USP REFERENCE STANDARDS FOR PURCHASE
USP Apocarotenal RSUSP Astaxanthin Esters from Haematococcus pluvialis RS