Iron Oxide(Iron(III) oxide)
Other names : Ferric oxide,Hematite
CAS # : 1309-37-1
Molecular formula Fe2O3
Molar mass 159.69 g/mol
Appearance red-brown solid
Density 5.242 g/cm3, solid
Melting point 1566 °C (1838 K) decomp.
Solubility in water insoluble
Characteristics and Application :
Iron(III) oxide also known as ferric oxide, Hematite, red iron oxide, synthetic maghemite, colcothar, or simply rust ,is one of the several oxide compounds of iron, and has paramagnetic properties.
A very fine powder of ferric oxide is known as jeweller's rouge, red rouge, or simply rouge. It is used to put the final polish on metallic jewellery and lenses, and historically as a cosmetic.
Iron(III) oxide is also used as a pigment, under names Pigment Brown 6, Pigment Brown 7, and Pigment Red 101. Some of them, e.g. Pigment Red 101 and Pigment Brown 6, are Food and Drug Administration (FDA)-approved for use in cosmetics.
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