Fucoxanthin is a xanthophyll, with formula C42H58O6. It is found as an accessory pigment in the chloroplasts of brown algae and most other heterokonts, giving them a brown or olive-green color. Fucoxanthin absorbs light primarily in the blue-green to yellow-green part of the visible spectrum, peaking at around 510-525 nm by various estimates and absorbing significantly in the range of 450 to 540 nm.

CAS：3351-86-8
中文别名：3\'-(乙酰氧基)-6\',7\'-二脱氢-5,6-环氧-5,5\',6,6\',7,8-六氢-3,5\'-二羟基-8-氧代-beta,beta-胡萝卜素;
英文别名：[(1S,3R)-3-hydroxy-4-[(3E,5E,7E,9E,11E,13E,15E)-18-[(1R,3S,6S)-3-hydroxy-1,5,5-trimethyl-7-oxabicyclo[4.1.0]heptan-6-yl]-3,7,12,16-tetramethyl-17-oxooctadeca-1,3,5,7,9,11,13,15-octaenylidene]-3,5,5-trimethylcyclohexyl] acetate;Fucoxanthin;Fucoxanthin DISCONTINUED;β,β-Carotene, 3‘-(acetyloxy)-6‘,7‘-didehydro-5,6-epoxy-5,5‘,6,6‘,7,8-hexahydro-3,5‘-dihydroxy-8-oxo-, (3S,3‘S,5R,5‘R,6S,6‘R)-;all-trans-Fucoxanthin;
分子式：C42H58O6
分子量：658.906
精确质量：658.423
Psa：96.36
Logp：8.6922

外观与性状：结晶粉末
密度：1.09 g/cm3
沸点：764.1ºC at 760 mmHg
熔点：166-168ºC
闪点：223ºC
折射率：1.563