Just an FYI that some chemicals don't need anything at all to combust while others can do so by simply mixing vapors. Chemical vapor is invisible so we tend to ignore the potential, but it some chemical vapors can poison on their own with no assistance.
If you store chemicals in your house or garage, please make sure that they are tightly sealed and no air can escape.
It's always a good idea to research any chemicals you use and heed their safety and storage suggestions.
I try to avoid unnatural chemicals as much as possible in whatever I do.
End public message...