Definition: The term "arsenoferratin" is a scientific chemical element, specifically an iron compound named arsenic ferrate (FeS2), that is also known as red lead. It has been found in various materials, including firestones, ores, and steel. The chemical formula of arsenoferratin is FeS2. It can be produced from the fuming pyrite ore or iron ore where it is present. Arsenic ferrate reacts with sulfuric acid to produce sulfur dioxide and ferric oxide.