Haematins
Hämatine [hydroxo (III) porphyrin coordination complexes] are complex compounds of the heme with the iron ion in the oxidation state + III and a hydroxide ion as axial ligands .
properties
The hematin b of the heme b is referred to as hematin for short , with the empirical formula C 34 H 32 N 4 O 4 · FeOH, the molar mass 633.49 g / mol and the CAS number 15489-90-4.
Hematins are soluble in acetic acid, diluted alkalis and ether.
Occur
Hematin is only found in the blood under pathological conditions such as hyperchromia due to pernicious anemia , phosgene poisoning, etc.
Hematin is a black pigment that is formed when hemoglobin and hydrochloric acid come together , for example in the case of gastric bleeding . His excretion shows up as a tarry stool , vomit is also black ( broken coffee grounds ).