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  2. Chromium - Wikipedia

    en.wikipedia.org/wiki/Chromium

    Because chromium compounds were used in dyes, paints, and leather tanning compounds, these compounds are often found in soil and groundwater at active and abandoned industrial sites, needing environmental cleanup and remediation. Primer paint containing hexavalent chromium is still widely used for aerospace and automobile refinishing ...

  3. Chromium(III) oxide - Wikipedia

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

    Because of its considerable stability, chromia is a commonly used pigment. It was originally called viridian. It is used in paints, inks, and glasses. It is the colorant in "chrome green" and "institutional green." Chromium(III) oxide is a precursor to the magnetic pigment chromium dioxide, by the following reaction: [8] Cr 2 O 3 + 3 CrO 3 → ...

  4. Chromium compounds - Wikipedia

    en.wikipedia.org/wiki/Chromium_compounds

    Chromium compounds are compounds containing the element chromium (Cr). Chromium is a member of group 6 of the transition metals. The +3 and +6 states occur most commonly within chromium compounds, followed by +2; charges of +1, +4 and +5 for chromium are rare, but do nevertheless occasionally exist. [3] [4]

  5. Calcium chromate - Wikipedia

    en.wikipedia.org/wiki/Calcium_chromate

    A very rare anhydrous mineral form exists in nature, which is known as chromatite. [1] The compound is occasionally used as a pigment, but this usage is limited due to the very toxic and carcinogenic nature of hexavalent chromium compounds such as chromate salts.

  6. Viridian - Wikipedia

    en.wikipedia.org/wiki/Viridian

    Chromium(III) oxide sample Viridian(Pigment Green 18) (Left) And Phthalocyanine Green(Pigment Green 7) (Right) Gouache. Viridian is a blue-green pigment, a hydrated chromium(III) oxide, of medium saturation and relatively dark in value. It is composed of a majority of green, followed by blue.

  7. Hexavalent chromium - Wikipedia

    en.wikipedia.org/wiki/Hexavalent_chromium

    Hexavalent chromium (chromium(VI), Cr(VI), chromium 6) is any chemical compound that contains the element chromium in the +6 oxidation state (thus hexavalent). [1] It has been identified as carcinogenic, which is of concern since approximately 136,000 tonnes (150,000 tons) of hexavalent chromium were produced in 1985. [ 2 ]

  8. Alchemical symbol - Wikipedia

    en.wikipedia.org/wiki/Alchemical_symbol

    Although notation was partly standardized, style and symbol varied between alchemists. Lüdy-Tenger [1] published an inventory of 3,695 symbols and variants, and that was not exhaustive, omitting for example many of the symbols used by Isaac Newton. This page therefore lists only the most common symbols.

  9. Isotopes of chromium - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_chromium

    Chromium-51 is a synthetic radioactive isotope of chromium having a half-life of 27.7 days and decaying by electron capture with emission of gamma rays (0.32 MeV); it is used to label red blood cells for measurement of mass or volume, survival time, and sequestration studies, for the diagnosis of gastrointestinal bleeding, and to label platelets to study their survival.