Molybdenum
Precautions

Molybdenum dusts and fumes, generated by mining or metalworking, can be toxic, especially if ingested (including dust trapped in the sinuses and later swallowed). Low levels of prolonged exposure can cause irritation to the eyes and skin. Direct inhalation or ingestion of molybdenum and its oxides should be avoided. OSHA regulations specify the maximum permissible molybdenum exposure in an 8-hour day as 5 mg/m. Chronic exposure to 60 to 600 mg/m can cause symptoms including fatigue, headaches and joint pains. At levels of 5000 mg/m, molybdenum is immediately dangerous to life and health.
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