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  2. Iron (II,III) oxide - Wikipedia

    en.wikipedia.org/wiki/Iron(II,III)_oxide

    Iron(II,III) oxide, or black iron oxide, is the chemical compound with formula Fe 3 O 4.It occurs in nature as the mineral magnetite.It is one of a number of iron oxides, the others being iron(II) oxide (FeO), which is rare, and iron(III) oxide (Fe 2 O 3) which also occurs naturally as the mineral hematite.

  3. Iron oxide - Wikipedia

    en.wikipedia.org/wiki/Iron_oxide

    Iron is stored in many organisms in the form of ferritin, which is a ferrous oxide encased in a solubilizing protein sheath. [ 10 ] Species of bacteria , including Shewanella oneidensis , Geobacter sulfurreducens and Geobacter metallireducens , use iron oxides as terminal electron acceptors .

  4. Thermite - Wikipedia

    en.wikipedia.org/wiki/Thermite

    Red iron(III) oxide (Fe 2 O 3, commonly known as rust) is the most common iron oxide used in thermite. [ 14 ] [ 15 ] [ 16 ] Black iron(II,III) oxide (Fe 3 O 4 , magnetite ) also works. [ 17 ] Other oxides are occasionally used, such as MnO 2 in manganese thermite, Cr 2 O 3 in chromium thermite, SiO 2 (quartz) in silicon thermite, or copper(II ...

  5. Black oxide - Wikipedia

    en.wikipedia.org/wiki/Black_oxide

    Like hot black oxide, mid-temperature black oxide converts the surface of the metal to magnetite (Fe 3 O 4). However, mid-temperature black oxide blackens at a temperature of 90–120 °C (194–248 °F), [6] significantly less than hot black oxide. This is advantageous because it is below the solution's boiling point, meaning there are no ...

  6. Red Dye 3 Just Got Banned. These Are the Foods to Avoid If ...

    www.aol.com/red-dye-3-just-got-134800003.html

    The FDA has banned Red Dye No. 3 dye from food and ingested drug products. Here are the food products containing Red 3 and how the ban affects you. ... and iron oxides (red, brown and black ...

  7. Magnetite - Wikipedia

    en.wikipedia.org/wiki/Magnetite

    Magnetite is black or brownish-black with a metallic luster, has a Mohs hardness of 5–6 and leaves a black streak. [7] Small grains of magnetite are very common in igneous and metamorphic rocks. [11] The chemical IUPAC name is iron(II,III) oxide and the common chemical name is ferrous-ferric oxide. [12]

  8. Iron(III) oxide - Wikipedia

    en.wikipedia.org/wiki/Iron(III)_oxide

    Iron(III) oxide is also used as a pigment, under names "Pigment Brown 6", "Pigment Brown 7", and "Pigment Red 101". [22] Some of them, e.g., Pigment Red 101 and Pigment Brown 6, are approved by the US Food and Drug Administration (FDA) for use in cosmetics. Iron oxides are used as pigments in dental composites alongside titanium oxides. [23]

  9. Rust converter - Wikipedia

    en.wikipedia.org/wiki/Rust_converter

    Tannic acid chemically converts the reddish iron oxides into bluish-black ferric tannate, a more stable material. [2] The second active ingredient is an organic solvent such as 2-butoxyethanol (ethylene glycol monobutyl ether, trade name butyl cellosolve) that acts as a wetting agent and provides a protective primer layer in conjunction with an ...

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