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<p>[QUOTE=&quot;-jeffB, post: 3296375, member: 27832&quot;]I turned in my gallon of carbon tet to a chem department for safe disposal decades ago. I&#039;ve regretted it from time to time since.</p><p><br /></p><p>I looked up perfluoromethyldecalin -- density 1.92. &quot;Hmm,&quot; I thought to myself, &quot;that could be handy for all sorts of things! Wonder how much it costs...&quot;</p><p><br /></p><p>Looks like about $100 per fluid ounce. Perhaps not.</p><p><br /></p><p>I&#039;ll probably waste some time now looking for affordable dense liquids. Mercury is bad, as you say, and too dense for anything but gold or platinum anyhow. Bromine is easy to make, but terrible for metal objects (and their owners). Hmm. Solutions of heavy stuff? Hmm...[/QUOTE]</p><p><br /></p>

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