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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: [7] Cr 2 O 3 + 3 CrO 3 → ...
Paris Green: It was manufactured in 1814 to be a pigment to make a vibrant green paint; Cadmium pigments. Cadmium green: a light green pigment consisting of a mixture of cadmium yellow (CdS) and chrome green (Cr 2 O 3). Chromium pigments. Chrome green (PG17): anhydrous chromium(III) oxide (Cr 2 O 3). Viridian (PG18): hydrated chromium(III ...
The earliest known use of chrome yellow in a painting is a work by Sir Thomas Lawrence from before 1810. [12] The first recorded use of chrome yellow as a color name in English was in 1818. [13] The pigment was also widely used in industrial applications, such as in the production of paint, plastics, and ceramics. [2]
Iron(II) oxide may be added to glass resulting in bluish-green glass which is frequently used in beer bottles. Together with chromium it gives a richer green color, used for wine bottles. Sulfur, together with carbon and iron salts, is used to form iron polysulfides and produce amber glass ranging from yellowish to almost black.
Chromium trioxide (also known as chromium(VI) oxide or chromic anhydride) is an inorganic compound with the formula CrO 3. It is the acidic anhydride of chromic acid, and is sometimes marketed under the same name. [6] This compound is a dark-purple solid under anhydrous conditions and bright orange when wet. The substance dissolves in water ...
A large number of chromium(III) compounds are known, such as chromium(III) nitrate, chromium(III) acetate, and chromium(III) oxide. [8] Chromium(III) can be obtained by dissolving elemental chromium in acids like hydrochloric acid or sulfuric acid, but it can also be formed through the reduction of chromium(VI) by cytochrome c7. [9] The Cr 3+
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 . The first recorded use of viridian as a color name in English was in the 1860s. [ 2 ]
Chromium(IV) oxide is used to manufacture magnetic tape used in high-performance audio tape and standard audio cassettes. [93] Chromium(III) oxide (Cr 2 O 3) is a metal polish known as green rouge. [94] [95] Chromic acid is a powerful oxidizing agent and is a useful compound for cleaning laboratory glassware of any trace of organic compounds. [96]