hemin

noun Biochemistry.

1. the typical, microscopic reddish-brown crystals, C34H32N4O4FeCl, resulting when a sodium chloride crystal, a drop of glacial acetic acid, and some blood are heated on a slide: used to indicate the presence of blood.

n.

1. The reddish-brown crystalline chloride of heme produced when hemoglobin reacts with certain reagents in a test for the presence of blood.hematin chloride