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定義
本品は、鉄の酸化物であり、ベンガラ、黄酸化鉄、黒酸化鉄などを含む。
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化粧品の成分用途
着色剤
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説明
As the mineral hematite, Iron oxide is the main source of iron for the steel industry. Iron oxide is easily attacked by acids. Iron(III) oxide is regularly called rust, and to some extent this label is useful, as rust shares several properties and has a comparable composition. To a chemist, though, rust is thought of as an ill-defined material, described as hydrated ferric oxide. Fe2O3 can be formed in various polymorphs.
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使用
iron oxide (iron oxide black, red, or yellow) is an inorganic compound frequently used to add color to cosmetics. It may have some slight sun screening ability. Iron oxide can vary in color from red to brown, black to orange or yellow, depending on the purity and amount of water added.
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定義
Pigments composed mainly of
ferric oxide (Fe2O3).
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工業用途
Iron oxide is the fine red abrasive component of rouge. Like tripoli, rouge is blended with various soft binders into a cake form. It is used to polish high noble metal alloys such as yellow gold alloys.
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Solubility in organics
Iron(III) oxide is insoluble in water but dissolves readily in strong acid, for example, hydrochloric and sulfuric acids. It likewise dissolves well in solutions of chelating agents such as EDTA and oxalic acid. Heating iron(III) oxides with other metal oxides or carbonates yields materials known as ferrates (ferrate (III)).
