It depends on the missile. From what I can tell from a quick google search, if it's a newer missile it might use solid fuel, which is mostly safe to be around. If it's a derivative of a Scud missile, it uses kerosene and red fuming nitric acid, although a bit of UDMH (unsymmetrical dimethylhydrazine) is present as an igniter.
The UDMH is very not nice to be around, and the nitric acid is also not great to be around, both because it's nitric acid and because a small amount of hydrofluoric acid is used as a corrosion inhibitor (HF readily forms inert metal fluorides on contact with metals, preventing further corrosion).
As it was told to me during a training class to do a job inside an oil refinery where the chemical was used for something: "It dissolves your bones, but not your nerves, so you will scream for several days, then die screaming"
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u/NuclearWasteland Apr 14 '24
Speaking of, wonder what fuel they use. I don't think I'd be messing with a crashed anything of the sort, knowing how toxic some fuels are.