[thekid_frankie]

This is the first time I have needed a compound for density measurements that requires a density this high (2.8 - 3.0) none of common solvents I have experience with will work.  As always I have hit dead-end-like speedbump in research before turning to here.  Any suggestions?
Thanks

[discodermolide]

Try this: Methylene iodide has a density of 3.31 g/ml, a vapour pressure of 1.2 mm Hg at 25 C, and a low viscosity of 2.6 cP.
But it will be toxic and light sensitive,http://en.wikipedia.org/wiki/Diiodomethane
or here
http://chemyq.com/En/xz/xz1/3808lxkve.htm

[Dan]

Also Bromoform ~2.9 g/mL. Toxic as well though.

[curiouscat]

This is the first time I have needed a compound for density measurements that requires a density this high (2.8 - 3.0) none of common solvents I have experience with will work.

Purely out of curiosity, why do you need this? You did mention density measurement; does that mean for calibration of a meter? Or....?

[benjamin5476]

I think Bromoform and Chloroform are relatively stable sources .