ferric iron compound

chemistry

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June 26, 2026

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Ferric refers to compounds containing iron, specifically with a valence of three. Iron (Fe) is a chemical element and a metal, crucial in Earth's crust and core, and abundant in stars. It exists in various oxidation states, with +2 (ferrous) and +3 (ferric) being the most common.123

Ferric compounds include ferric oxide (Fe₂O₃), found as the mineral hematite, used as a pigment and in cosmetics. Ferric salts act as coagulants for wounds and are used in water purification. Ferric ammonium citrate is used as an appetite stimulant. Iron's ability to change oxidation states is fundamental to many chemical and biological processes, including its role in hemoglobin for oxygen transport in human blood.24

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geologic history of Earth
Formation of the secondary atmosphere
…had to be converted to ferric iron, which is highly insoluble, before it could be precipitated as iron formations. In short, the organisms produced the oxygen and the iron formations accepted it. Iron formations can be found in the earliest sediments (those deposited 3.8 billion years ago) at Isua in…
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…had to be converted to ferric iron, which is highly insoluble, before it could be precipitated as iron formations. In short, the organisms produced the oxygen and the iron formations accepted it. Iron formations can be found in the earliest sediments (those deposited 3.8 billion years ago) at Isua in…
Read More

pottery
Painting
The colours obtained from ferric iron range from pale yellow to black, the most important being a slightly orange red, referred to as iron red. Ferrous iron yields a green that can be seen at its best on Chinese celadon wares. Manganese gives colours varying from the bright red…
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The colours obtained from ferric iron range from pale yellow to black, the most important being a slightly orange red, referred to as iron red. Ferrous iron yields a green that can be seen at its best on Chinese celadon wares. Manganese gives colours varying from the bright red…
Read More