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A material that will not dissolve in another is known as insoluble. Wax will not dissolve in water, rocks will not disolve in alcohol, and so on. Caffiene is soluble in liquid CO2 for example.

Differential solubility is a very powerful technique in process chemistry and also in analysis.

Teflon (polytetrafluorethylene) is a fairly inert substance, but starts to degrade above 200oC.

It is resistant to most solvents, but we used tetrahydrofuran to etch it in strain gauge applications. So its inertness is not absolute.

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14y ago

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