Is there any type of liquid, other than mercury, that PTFE teflon is known to "float" to the surface in?

Question

The specific gravity of PTFE teflon is roughly 2.3. I have a 3/8" diameter sphere made up of entirely PTFE teflon, and I would like for it to float to the surface when dropped into a liquid.

Does anyone know of a liquid, other than mercury, that will allow this feat to be achievable?

(I prefer that the liquid be both non-toxic and inexpensive)

https://en.wikipedia.org/wiki/Clerici_solution - unfortunately toxic and expensive. That aside, I know that caesium chloride is used for centrifugation purposes although I'm not sure what's the highest density it can reach (lazy to calculate it right now). — orthocresol, Feb 10 '16 at 16:08
I don't think cesium chloride is quite dense enough (in aqeeous solution). Cesium bromide might do the trick. — Curt F., Jun 25 '16 at 04:36

score 2 · Answer 1 · edited Jun 24 '16 at 00:09

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Various liquids are denser than $2.2\rm~\frac{g}{cm^3}$. $\ce{CBr2F2}$ is one of them with fairly low toxicity. Check out halons.

edited Jun 24 '16 at 00:09

M.A.R.

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answered Jun 23 '16 at 23:50

Li Zhi

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Is there any type of liquid, other than mercury, that PTFE teflon is known to "float" to the surface in?

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