If you were to be scared off by an MSDS in isolation, then you wouldn’t even put cardboard or wood in your glowforge. Burning wood puts out hydrogen cyanide and hosts of carcinogens. As long as your exhaust ventilation is working well with no leaks and getting that stuff out of your house most combustion products ain’t gonna get ya. But don’t laser anything with halogens (fluorine, chlorine, bromine, iodide) since those will produce byproducts that will eat your glowforge from the inside out.
And I agree with jbmanning5, the hazardous decomposition section is always a pretty good read. And it puts to use my college chemistry, which wouldn’t get used otherwise.