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Health Hazards Of Chromium

wallpapers News 2020-12-29
Chromium symbol Cr, silver-white metal, belongs to group VIB in the periodic table. Chromium has an atomic number of 24 and an atomic weight of 51.9961. It is a body-centered cubic crystal. The common valences are +3, +6 and +2. The oxidation number is 10. In 1797, French chemist L.N.Vauquelin discovered a new element in Siberian red lead ore (chrome-lead ore) and reduced it with carbon the following year to obtain metallic chromium. Because chromium can generate beautiful multi-colored compounds, it is named chromium according to the Greek word chroma (color).
 
Health hazard
 
Entry route: inhalation, ingestion.

 
Health hazards: trivalent chromium has almost no harmful effects on the human body, and there is no report of industrial poisoning. The chromium that enters the human body is accumulated in human tissues, and is metabolized and eliminated slowly. After entering the blood, chromium mainly binds to globulin, albumin, and r-globulin in plasma. Hexavalent chromium can also penetrate the red blood cell membrane, and 50% of the hexavalent chromium can enter the cell within 15 minutes, and bind to hemoglobin after entering the red blood cell. Chromium metabolites are mainly excreted from the kidneys, and a small amount is excreted in feces.
 
Hexavalent chromium is mainly a chronic poison to humans. It can invade the human body through the digestive tract, respiratory tract, skin and mucous membranes, and mainly accumulate in the liver, kidneys and endocrine glands in the body. Those entering through the respiratory tract tend to accumulate in the lungs. Hexavalent chromium has a strong oxidizing effect, so chronic poisoning often starts with local damage and gradually progresses to incurable. When it invades the human body through the respiratory tract, it begins to invade the upper respiratory tract, causing rhinitis, pharyngitis, laryngitis, and bronchitis.

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