Tungsten compounds are toxic, especially sodium tungstate is more toxic. Rabbit intramuscular injection (mg tungstate/kg) LDso: 105; rat subcutaneous injection (mg tungstate/kg) LDso: 240. After exposure to tungsten compounds, people’s upper respiratory tract and deep respiratory tract are stimulated, and they suffer from bronchial asthma and gastrointestinal dysfunction due to the action of dust. Skin contact causes scaling to appear on the skin. The United States stipulates that the maximum allowable concentration of tungsten and its soluble compounds in the air (calculated as tungsten) is 1 mg/m3, and that of insoluble compounds (calculated as tungsten) is 5 mg/ma. Staff should be well protected. This product should be stored in a cool, dry warehouse, and pay attention to moisture. Keep the packaging intact during storage and transportation. Do not store and transport together with acids. Protect from the sun and rain during transportation.
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