Urobilin, also known as urochrome, is the tetrapyrrole chemical compound that is primarily responsible for the yellow color of urine. Urobilin is formed through the oxidation of its parent compound uroblinogen.

What causes pigment urochrome?

This coloring is primarily caused by the pigment urochrome, also known as urobilin. Whether your urine is diluted by water or in a more concentrated form determines the appearance of the pigment. The more water you drink, and the more hydrated you become, the lighter the pigment in your urine.

What is pigment urochrome?

Urochrome is a pigment that causes the yellow color in urine. It is a breakdown product of the blood's hemoglobin and is removed by the kidneys. Depending on the amount of Urochome the urine might be darker.