hemin

/ˈhiːmɪn/
noun
  1. A dark crystalline compound derived from hemoglobin, used in biochemical research and forensic tests to detect blood.
    • Hemin crystals are often used in labs to study how blood breaks down.
    • In the chemistry class, we prepared hemin from dried blood to observe its structure.
    • The forensic scientist added hemin to the sample to confirm the presence of blood.