Combustion Testing
The percentage of sprayed paraquat which passes unchanged
into marijuana smoke was estimated by NIDA in
July 1978 to be 0.2 per cent.22 Further combustion testing
data produced under contract to the NIEHS also indicated
that the 0.2 per cent figure was reasonably accurate.28 Most
of the paraquat was found to be pyrolyzed to 4,4'-dipyridyl.