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Solubility of cholesterol, bile pigments, and 2-butanone?


I dissolved crushed gallstones in 2-butanone. Cholesterol dissolved, and other impurities such as bile pigments did not.
I know cholesterol is polar due to the OH group, and that the bile pigments are comprised of linear tetrapyrroles.

Can anyone account for why cholesterol dissolved and bile pigments did not?

Actually cholesterol is very non polar. The large number of saturated carbons in the ring structure far out weighs the poarity of the single OH group. 2-butanone is relatively non polar, the bile pigments are polar.

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