Chromium is a naturally occurring element found in rocks and soil. It can exist in several different forms. The metal form,
chromium(0), is used for making steel. Chromium(VI) and chromium(III) are used for chrome plating, dyes and pigments, leather
tanning, and wood preserving. Chromium(III) is an essential nutrient that helps the body use sugar, protein, and fat.
Breathing high levels of chromium(VI) can cause irritation and ulceration in the lining of the nose, and difficulty in breathing.
Skin contact with chromium(VI) compounds can cause skin ulcers and allergic skin reactions. Chromium(VI) compounds are known
human carcinogens. In workers, inhalation of chromium(VI) has been shown to cause lung cancer.
Chromium (VI) Concentrations in Outdoor Air, by New Jersey County, NATA 2005
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