Iron(III) pyrophosphate
Iron(III) pyrophosphate is an inorganic compound with the formula Fe4(P2O7)3. It is a black solid that is insoluble in water. It is one of the few iron compounds that is not colored.
Structure and properties[edit | edit source]
Iron(III) pyrophosphate features iron in its +3 oxidation state. It is a mixed-valence compound, featuring iron in both its +2 and +3 oxidation states. The compound is composed of pyrophosphate (P2O7)4- anions and iron(III) cations. The pyrophosphate anions are arranged in a cubic close packed array while the iron(III) cations occupy the octahedral holes.
Synthesis[edit | edit source]
Iron(III) pyrophosphate can be synthesized by the reaction of iron(III) chloride with sodium pyrophosphate. The resulting precipitate is then washed and dried.
Applications[edit | edit source]
Iron(III) pyrophosphate is used as a catalyst in a variety of chemical reactions. It is also used in the manufacture of glass and ceramics, and as a corrosion inhibitor.
Health effects[edit | edit source]
Iron(III) pyrophosphate is generally considered to be non-toxic. However, like all iron compounds, it can be harmful in large amounts. Symptoms of iron poisoning include stomach pain, nausea, vomiting, and in severe cases, organ failure.
See also[edit | edit source]
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Contributors: Prab R. Tumpati, MD