NO. Hydrogen gas is non-toxic. However, it can displace oxygen (and if hot enough burn in it) and thus can be an asphynxant in large quantities. But hydrogen by it self is not toxic at all.
Yes, Freon is toxic at certain levels. Overexposure causes central nervous system depression and possibly cardiac arrhythmia. Depending on the type of freon, it is also extremely cold and can cause...
if it was toxic it would harm and irritate the skin which causes a rash, becomes very hot and itchy where you have sprayed it and it could also have these affects, feel dizzy, feel faint, appearance...