http://www.hms-beagle.com/PDFs/BenchMark_Legacy_Chemicals_Pl...
Any bio&|chem know what's likely to do singe eyebrows or suffocate?
Setting fire to that will produce crap loads of smoke very quickly. I filled my entire garden up with smoke with one of them a couple of years ago.
Sure there are more in that list but that strikes me as the most obvious.