A presumptive test for blood in which a small amount of acetone (propenal) is added to the bloodstain, followed by a drop of hydrochloric acid. Haemoglobin produces derivatives such as haematin and haemin, forming small characteristic crystals that can be identified under a microscope.

What is hemin used for?

Generic Name: hemin

This medication is used to treat the symptoms that occur with certain blood disorders (porphyrias). Other treatments are recommended for trial before using hemin, also called hematin. Hemin is not a cure for porphyria.

Why is haemin test done?

Haemin crystals are used in medico-legal practices to distinguish fresh or dried blood stains from other red-coloured stains. The shape of haemin crystals varies in different species and thus, blood stains of human can be confirmed.