Iron(II) oxide, also known as ferrous oxide or ferrous iron, is one of the iron oxides. It is a black-colored powder with the chemical formula FeO. It consists of the chemical element iron in the oxidation state of 2 bonded to oxygen. Its mineral form is known as wüstite. The latter term is often used synonymously to ferrous oxide. IUPAC nomenclature is a systematic way of naming organic chemical compounds. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... A substance is soluble in a fluid if it dissolves in that fluid. ... Water has the chemical formula H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... Iron oxide pigment There are a number of iron oxides: Iron oxides Iron(II) oxide or ferrous oxide (FeO) The black-coloured powder in particular can cause explosions as it readily ignites. ... General Name, Symbol, Number iron, Fe, 26 Chemical series transition metals Group, Period, Block 8, 4, d Appearance lustrous metallic with a grayish tinge Atomic mass 55. ... General Name, Symbol, Number oxygen, O, 8 Chemical series Nonmetals, chalcogens Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ... A chemical element, often called simply element, is a chemical substance that cannot be decomposed or transformed into other chemical substances by ordinary chemical methods. ... General Name, Symbol, Number iron, Fe, 26 Chemical series transition metals Group, Period, Block 8, 4, d Appearance lustrous metallic with a grayish tinge Atomic mass 55. ... In chemistry, the oxidation state is a measure of the degree of oxidation of an atom in a chemical compound. ... General Name, Symbol, Number oxygen, O, 8 Chemical series Nonmetals, chalcogens Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ... Wüstite (FeO) is a rare mineral form of iron(II) oxide found with meteorites and native iron. ...

• Molecular weight: 71.85
• Melting Point: 1370°C
• CAS number: 1345-25-1

Iron(II) oxide should not be confused with rust, which usually consists of iron(III) oxide (ferric oxide). A degree Celsius (°C) is a unit of temperature named after the Swedish astronomer Anders Celsius (1701-1744), who first proposed a similar system in 1742. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences and alloys. ... A blacksmith removing rust with sand prior to welding Rust damage in automobiles can cause hidden yet dangerous situations. ... Iron(III) oxide — also known as ferric oxide, red iron oxide, synthetic maghemite, colcothar, or simply rust — is one of several oxide compounds of iron, and is most notable for its ferromagnetic properties. ...

Iron(II) oxide is used as a pigment. It is FDA-approved for use in cosmetics and it is used in some tattoo inks. In biology, pigment is any material resulting in color in plant or animal cells which is the result of selective absorption. ... This article or section is in need of attention from an expert on the subject. ... A tattoo is a mark made by inserting pigment into the skin: in technical terms, tattooing is micro-pigment implantation. ...

References

• http://webmineral.com/data/Wustite.shtml