Skin diseases caused by chromium and its compounds

1. Industrial applications such as metal chrome plating (25% to 50% chromic acid for chromium plating), pigments, tanning leather, printing and dyeing, photoengraving, alloy steel, matches, batteries and other industrial sectors all use chromic acid, chromium manganese salt or its Dichromates. Industry mainly uses its trivalent or hexavalent compounds, such as chromium oxide (Cr2O3), chromic acid (chromium trioxide, CrO3), chromium chloride (CrCl3), sodium chromate (Na2CrO4) or potassium chromate (K2CrO4), Potassium dichromate (K2Cr2O7) or sodium dichromate (Na2Cr2O7). 2. Physical and chemical properties Chromium is a silvery white shiny metal, which is hard and resistant to corrosion. Chromium can exist in the form of di-, tri-, and hexavalent compounds. Divalent chromium is extremely unstable and is easily oxidized to high-valent chromium. Cr6 is easily reduced to Cr3 under acidic conditions. Low-value chromium can be oxidized under alkaline conditions. Into dichromate.

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