Tungsten and humans
Important
data
Average
Tungsten Level in Blood is 5.8±3.5μg W·1-1 (1μg W·1-1).
Average
Tungsten Level in Bones is 0.25ppb W.
Demand
per Day is 1-15μg.
Occupational
Health. MAX/NIOSH (TLV-TWA):1mg·m-3 W or souble W compounds, 5 mg·m-3 WC or other insoluble
compounds.
Patch Test. In 853
tested workers, 2% showed irritant pustular reactions when exposed to Na2WO4.
Due
to the special
nature of the
tungsten alloy, now, it is increasingly
being used in rings instead of Gold
& Platinum
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