Peter John Keating wrote:

>Greetings,
> I plan to treat some of my hives with oxalic acid using a vaporiser.   Could some one advise me to which type of
>protection I should use?
>  
>
Manufacturers of vaporizers claim, of course, that vaporizers are safe 
to operate. For (I assume) an independent opinion, Gumpp, et al. (2003), 
in Germany, found that “By appropriate use there is no risk to the 
health of the apiarist.” Their feeling was that the OA vapor quickly 
recondenses into an aerosol of tiny crystals, which are less dangerous 
than a vapor. They suggest wearing safety goggles, acid proof gloves, 
and a disposable cloth dust/mist mask equivalent to NIOSH N95 (“N95” 
will be stamped on the front—they cost anywhere from $12-$36 from 
Conney.com).

Gumpp, et al. 2003 Evaporation of oxalic acid—a safe method for the 
user? http://www.alp.admin.ch/themen/00502/00515/00519/index.html?lang=en

Randy Oliver


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