Hello, I want to conduct swelling test on EPDM O-ring seal specimens. What kind of solvent can I use? Is there a standard for it?

I find Cyclohexane C6H12 is OK, but I found no where to buy it.

Can I use other solvent? Maybe, can I use Hexahydroxycyclohexane? That is 6OH- C6H12.

Or can I use Cyclohexanol ? OH-C6H11

Or Toluene ? Cyclohexanone ?

Thanks a lot!