Workers beware, exposure to hexavalent chromium has been linked to the development of lung cancer. Used in the production of stainless and nickel alloys, it is a known human carcinogen that may also cause severe upper respiratory tract, skin, nasal, and kidney damage. Hexavalent chromium is used in pigments for photography and pyrotechnics, dyes, paints, inks and plastics, stainless steel...