Hemin (Standard) is the standard substance of Hemin, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Hemin (Hemin chloride) is a chlorinated iron-containing porphyrin, a heme oxygenase (HO)-1 inducer. Hemin has therapeutic activity in porphyrias by reducing heme deficiency in patients, thereby inhibiting δ-aminolevulinic acid synthetase activity through biochemical feedback.