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 Characteristics of the Chromium oxide

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PostSubject: Characteristics of the Chromium oxide   Mon Jul 18, 2011 9:55 am

The Chromium oxide (Cr2O3) (also called Chrome green) is the inorganic compound. With the CAS registry number 1308-38-9, its IUPAC name is called oxo(oxochromiooxy)chromium. As one of principal oxides of chromium, Chromium oxide is used as a pigment which was originally called viridian. The chemical belongs to the product categories of Dyes and Pigments; Inorganic & Organic Chemicals; Inorganics. What's more, its EINECS number is 215-160-9. When you are using this chemical, please be cautious about Chromium oxide. You must avoid contacting it with your skin and eyes.
Chromium oxide is a hard and brittle material. It turns brown when heated, but reverts to its dark green color when cooled. It is also hygroscopic and is antiferromagnetic up to 307 K, the Neel temperature. It melts at 2435 °C. Chromium oxide is insoluble in water and soluble in acids. It dissolves in acid to produce hydrated chromium ions, [Cr(H2O)6]3+ and dissolves in concentrated alkali to yield chromite ions. In addition, Chromium oxide is a green crystalline powder.
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