Bilirubin is a reddish-yellow bile pigment, C33H36N4O6, RN: 635-65-4,derived from the degradation of heme. Principal pigment of bile and one of the major end products of hemoglobin decomposition. It is known to function as an antioxidant and efficient peroxyl radical scavenger. Used as a standard substance in clinical diagnostics.In diagnostics, bilirubin levels are measured in patients showing signs of abnormal liver function. Determining a neonatal bilirubin level is considered standard medical care. Our bilirubin has past thin layer chromatography and liquid chromatography test by Hubei Entry & Exit Inspection and Quarantine Bureau Technology Centre. We can produce 40~50Kg bilirubin every mouth, which the purity is more than 95% ,and the structural stability is well , the content isn't reduce in more than one years..