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The Collaborative International Dictionary

Hemin \He"min\, n. [Gr. a"i^ma blood.] (Physiol. Chem.) A substance, in the form of reddish brown, microscopic, prismatic crystals, formed from dried blood by the action of strong acetic acid and common salt; -- called also Teichmann's crystals. Chemically, it is a hydrochloride of hematin.

Note: The obtaining of these small crystals, from old blood clots or suspected blood stains, constitutes one of the best evidences of the presence of blood.


n. a reddish brown substance produced in a laboratory test for the presence of blood by reaction with glacial acetic acid and sodium chloride


n. a reddish-brown chloride of heme; produced from hemoglobin in laboratory tests for the presence of blood [syn: protohemin]


Hemin (trade name Panhematin) is an iron-containing porphyrin. More specifically, it is protoporphyrin IX containing a ferric iron ion ( heme B) with a chloride ligand.

It is used in the management of porphyria attacks, particularly in acute intermittent porphyria.

It is sometimes distinguished from hematin which has a hydroxide ligand in place of the chloride. However, the terms are sometimes equated.

Hematin is considered the "X factor" required for the growth of Haemophilus influenzae.

Hemin (given name)

Hemin is a given name, and may refer to:

  • Hemin Desai (born 1977), Indian-born Omani cricketer
  • Hemin Mukriyani (1921-1986), Kurdish poet, journalist, translator, and literary critic

Usage examples of "hemin".

The hemoglobin takes up molecular oxygen in the lung capillaries, ozonizes it, and since hemin is easily reduced, the red cells give up oxygen to the muscle cells that need it, in return for carbon dioxide.

After it takes up the carbon dioxide, hemin turns purple and enters the vein system on the way back to the lungs, and we can forget it.

In the red corpuscle, a mass of hemin stands by to seize the carbon dioxide and offer more oxygen.

Just as the amino-acid and the hemin reach toward one another, their electronic attractions are suddenly neutralized by a bolt of pure energy from me: the viton!

Raseri gathered chu root, leaves of the hemin bush, and the bitter, milky stalks of the pok weed.