>>>>So which of these does the 1mg/cubic metre fall into

Peter, I checked a number of sources, and I can only get a TLV for oxalic
acid vapor, no one had a TLV-C.  But the question I'm really trying to find
out is:  are we dealing with a vapor that can cause serious harm if one
inadvertently inhales a single breath?  Clearly the vapor concentration
created in a hive far exceeds the TLV.

Do any of the manufacturers of the vaporizers have info, or are they willing
to demonstrate the safety of inhaling a lungful?  Those I've asked just say
"it's safe"--which would be the expected answer.  My guess is that the first
lawsuit against a vaporizer manufacturer for selling a potentially hazardous
product will dampen their enthusiasm.  

Again, the theory sounds great for distributing OA in the hive;  the
practice is what scares me!

Randy Oliver

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