Bilirubin crystals are found in acidic urine. They are soluble in acetic acid, hydrochloric acid, and sodium hydroxide. Insoluble in alcohol.
The presence of the crystals themselves is not significant. Rather, the presence of bilirubin in the urine in general is indicative of liver disease.
Appearance
Bilirubin crystals usually appear as small clusters of yellow-brown or reddish-brown needles. Bilirubin in urine typically stains other elements in the urine as well.
Other Crystals
Hippuric Acid
Tyrosine
