HandlingĬhromium compounds are toxic and should be handled with proper safeguards. Chromium compounds are used in the textile industry as mordants, and by the aircraft and other industries for anodizing aluminum. Other compounds are of industrial value lead chromate is chrome yellow, a valued pigment. ![]() The dichromates are used as oxidizing agents in quantitative analysis, also in tanning leather. It is denoted by the symbol Cr and atomic number 24. The most important chromates are those of sodium and potassium, the dichromates, and the potassium and ammonium chrome alums. Todays element is chromium, the first of the group 6 transition metals. CompoundsĪll compounds of chromium are colored. The refractory industry uses chromite for forming bricks and shapes, as it has a high melting point, moderate thermal expansion, and stability of crystalline structure. Chromium gives glass an emerald green color and is widely used as a catalyst. It is mostly used in plating to produce a hard, beautiful surface and to prevent corrosion. UsesĬhromium is used to harden steel, manufacture stainless steel, and form many useful alloys. The metal is usually produced by reducing the oxide with aluminum. The principal ore is chromite, which is found in Zimbabwe, Russia, New Zealand, Turkey, Iran, Albania, Finland, Democratic Republic of Madagascar, and the Phillippines. ![]() ![]() Discovered in 1797 by the Frenchman Louis Nicolas Vauquelin. Chromium is a steel-gray, lustrous, hard metal that takes a high polish. Chromium is used extensively in automobile trim as chromium metal because of its shiny finish and corrosion resistance.Ħ, 5, 4, 3, 2, 1, −1, −2, −4 (depending on the oxidation state, an acidic, basic, or amphoteric oxide)įrom the Greek word chroma, color.
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