Hematin as a noun is hemoglobin with iron in ferric state. while Haem as a noun is the component of haemoglobin responsible for binding oxygen, consists of an iron ion that binds oxygen and a porphyrin ring that binds the globin molecules; one molecule binds one molecule of oxygen.
Part of speech: noun
Definition: Hemoglobin with iron in ferric state. Hemin.
Part of speech: noun
Definition: The component of haemoglobin responsible for binding oxygen, consists of an iron ion that binds oxygen and a porphyrin ring that binds the globin molecules; one molecule binds one molecule of oxygen.
We hope you now know whether to use Hematin or Haem in your sentence.