Tungsten Oxide Hazard
（1）Tungsten oxide has toxicity, make contact with tungsten compounds will stimulate the upper respiratory tract and deep respiratory tract. Affected by dust will cause bronchial asthma, gastrointestinal disorders. Also affecting the skin which causes tubercule and scales. In America, the solubility limited for tungsten and tungsten soluble compounds is 1mg/m, insolubility of tungsten compounds is 5mg/m. Operators need to wear anti-poison respirator, gloves, glasses and garment of clean room to prevent dust leakage. So workers need to take body check and do the regular physical check.
（2）Tungsten oxide has stimulation toward human's eyes and skin. During the operating process, making contact or inhalating tungsten oxide will make people be general weakness, fever, rash, proteinuria. Although tungsten oxide is not flammable, but easy to react with halogen compounds, bromine pentafluoride, chlorine trifluoride and cause harmful toxic fumes.
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