Would have been so ridiculous. It was made to be able to drop the Tsar Bomba, basically... Pretty much created for the sole purpose of throwing a 100 megaton supernuke over the arctic sea to remove an entire landmass from existence. It also used highly toxic fuel... but I guess in the case of mutual assured destruction that's the least of anyone's worry.
Either way, the R36 is more than capable as an ICBM... fucker, like the Trident 2, can drop like 12 MIRV's or something and take out 80% of the population of either the eastern seaboard of the USA, or the general population of western russia, alone.