“BFRC”...Ha! I haven’t heard that term for a good long while. N2O4 is nasty stuff. The hydrazines will give you cancer if you even think about looking in their direction.
If you can smell, it’s too late. We used the term a lot during evac drill from 39 A/B. That’s what made me curious when I saw the pictures. Sure enough, MMH and N2O4.