Cobalt toxicology

GPSbouvier gpsbouvier at aol.com
Wed Mar 4 20:41:23 EST 1998


An earlier writer gave 0.1 mg/m^3 as the US federal short term exposure limit. 
However, a reference I have also gives a time weighted average of 0.05 mg/m^3.

You asked about blood levels.  None of my references give blood levels.  Since
the exposure you are describing is a respiratory exposure, engineering controls
and protective measures should keep the levels low enough to prevent detectable
blood levels.  This is especially true of cobalt compounds, since cobalt is a
carcinogen.

Also be aware that cobalt has been reported to cause dermatitis in sensitive
individuals.



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