Echinenone is a xanthophyll, with formula C40H54O. It is found in some cyanobacteria. It is synthesized from β-carotene by the enzyme beta-carotene ketolase (or CrtW). It has also been isolated from sea urchins.

CAS：432-68-8
中文别名：胆酸烯酮;
英文别名：all-trans-Echinenone;ECHINENONE;Einecs 207-083-4;
分子式：C40H54O
分子量：550.856
精确质量：550.417
Psa：17.07
Logp：11.7848

UNII：LJ5IO02MNQ

密度：0.972g/cm3
沸点：685.3ºC at 760mmHg
闪点：370.8ºC
折射率：1.57
蒸汽压：1.23E-18mmHg at 25°C