Health hazards from exposure to cobalt with special reference to carcinogenic, mutagenic and teratogenic effects†

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Abstract
Occupational exposure to cobalt‐containing dust may cause a severe type of pneumoconiosis as well as obstructive lung disease. Peroral exposure to cobalt chloride may under certain circumstances precipitate cardiomyopathy. There are only a limited number of experimental studies available which deal with the carcinogenic, mutagenic and teratogenic effects of cobalt and its salts. Single or repeated injections of cobalt powder or cobalt chloride have been shown to induce malignant tumours at the site of injection in rats, but not in mice. In vitro studies have shown that cobalt chloride has mutagenic and teratogenic properties. There are no data available on cancer incidence among workers occupationally exposed to cobalt. Thus the possible role of cobalt in human carcinogenesis is still an open question.

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