Or, for Titan, much nastier things (while the current Titan space launch vehicles are fairly inoffensive solid-and-hydrogen, the Titan ICBMs and early launchers were hydrazine).
Er, or not. Just checked; while the Titan IV is no longer in use, it was hydrazine til the end, in 2005(!) I was thinking of the Delta family, which did go from UDMH to hydrogen.