>> Dr. Ellis repeatedly and firmly made the point that safety concerns for
the beekeeper made vaporizing a very risky undertaking, and that there
wasn't any difference in effectiveness between the various methods of
applying oxalic.  

 James thanks for the data; I do not have access to the CRC handbook however
I have been researching CDC/NIOSH and have come to the conclusion that I do
not want to be in the near vicinity of a vaporizer using oxalic acid. I
ordered Oxalic Acid, Dihydrate 99.6% pure for my testing which came with a
MSDS, and for the sake of others using OA I will list some of the points in
hope that safety will be first on their list.
NFPA: Short exposure could cause serious temporary or residual injury even
though prompt medical attention was given 
HMIS III rating: Serious Hazard- Major injury likely unless prompt action is
taken and medical treatment is given
DOT: Class 8- Corrosive material 49 CRF 173.136
Reactivity: On heating: release of corrosive gasses/vapors (formic acid)
            Upon combustion: CO and CO2 are formed
            Decomposes on exposure to UV light: release of corrosive
gasses/vapors (formic acid)
pH: 1.0
Melting point: 101 C
Decomposition temperature: 157 C
Other properties: Hygroscopic. May sublimate.

A few links to the NIOSH cards I studied. The last one is a failure report.

http://www.cdc.gov/niosh/npg/npgd0474.html

http://www.cdc.gov/niosh/ipcsneng/neng0529.html
http://www.cdc.gov/niosh/nioshtic-2/00107259.html

Cheers

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