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Hexavalent chromium (chromium(VI), Cr(VI), chromium 6) is any chemical compound that contains the element chromium in the +6 oxidation state (thus hexavalent). [1] It has been identified as carcinogenic, which is of concern since approximately 136,000 tonnes (150,000 tons) of hexavalent chromium were produced in 1985. [ 2 ]
Chromium toxicity refers to any poisonous toxic effect in an organism or cell that results from exposure to specific forms of chromium—especially hexavalent chromium. [1] Hexavalent chromium and its compounds are toxic when inhaled or ingested. Trivalent chromium is a trace mineral that is essential to human nutrition.
Chromium and nickel-free welding is an innovative approach to reducing the health risks associated with traditional welding processes. By eliminating hazardous substances such as chromium and nickel from welding materials, this technology provides a safer environment for welders and nearby workers while maintaining high performance in various ...
OSHA's protection applies to all federal agencies. Section 19 of the OSH Act makes federal agency heads responsible for providing safe and healthful working conditions for their workers. OSHA conducts inspections of federal facilities in response to workers' reports of hazards and under programs that target high-hazard federal workplaces. [8]
After years of analysis and debate, California regulators have adopted a nation-leading drinking water standard for hexavalent chromium, a carcinogen found in water supplies across the state.
PG&E used chromium 6, or hexavalent chromium (a cheap and efficient rust suppressor), in its compressor station for natural-gas transmission pipelines. [1] [3] Hexavalent-chromium compounds are genotoxic carcinogens. In 1993, legal clerk Erin Brockovich began an investigation into the health impacts of the contamination. A class-action lawsuit ...
Hexavalent chromium ( Cr VI) is used in the electronics industry and for metal plating. [23] Chromium exposure is primarily inhalation or through ingestion. [ 24 ] Human and animal studies show that exposure to hexavalent chromium decreases semen quality and sperm counts.
For example, in the coating formed on aluminum by a commercial bath, about 23% of the chromium atoms were found to be hexavalent Cr 6+ , except in a region close to the metal. These chromium(VI) residues can migrate when the coating is wetted, and are believed to play a role in preventing corrosion in the finished part—specifically, by ...