Soluble in chloroform (10 mg/ml), benzene, chlorobenzene, carbon disulfide, alkaline solutions, aqueous acid, ethanol (slightly), and ether (slightly). Insoluble in water.
A principal pigment of bile and one of the major end products of hemoglobin decomposition
REVIEW Bilirubin is a principal pigment of bile and one of the major end products of hemoglobin decomposition. It contains conjugated double bonds and reactive hydrogen atoms. Serves as a physiological antioxidant. Reported to cross the blood-brain barrier and exert significant antioxidant effects in the brain. This product corresponds to the unconjugated form.