Hi Bonker,   Happy to help:   1.   Just to be clear, esters are not made from the fats, but rather from the fatty acids that are derived from the fats.  So long as the acids are pure and saturated it does not matter where they came from.  Many acids from vegetable oils are unsaturated and these would give unstable esters, but the saturated ones are fine.  Also the number of carbons in the acid matters.  Saturated acids longer than about C10 can cause a freeze point in some PO
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