Indoxyl Health Dictionary

a test for the presence of protein (albumin) in the urine. A quantity of urine is carefully poured onto the same quantity of pure nitric acid in a test tube. A white ring forms at the junction of the liquids if albumin is present. However, a similar result may be obtained if the urine contains certain drugs or is very concentrated. A dark brown ring indicates the presence of an abnormally high level of potassium indoxyl sulphate in the urine (see indicanuria). [J. F. Heller (1813–71), Austrian pathologist]... heller’s test

n. a compound excreted in the urine as a detoxification product of *indoxyl. Indican is formed by the conjugation of indoxyl with sulphuric acid and potassium on the decomposition of tryptophan.... indican