No, I do not know a lot. But as a military aviation man, I was obliged to study, in my youth, the measures to protect from chemweaps, as well as from other WMD. And I recall that all such (phosphorous based)_gases do not have long lifetime (it is measured out in days or few weeks depending on the weather).. To make them work longer they should be in a state close to solid (or at least liquid), but in this case how they could be dispersed?
I understand that this particular substance is unlike those that you were familiar with in earlier years and so it is unwise to extrapolate old knowledge to new formulations.
I agree this has nothing to do with football, to misquote Bill Shankly
It's more important than that.