What is Insoluble Impurities (ISO 663)?

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That’s a mea­sure of the pres­ence of dirt, min­er­als, resins, oxi­dized fatty acids, alka­line soaps of palmitic and stearic acids, and pro­teins that are sus­pended in the oil.n nnnIt is deter­mined by dis­solv­ing some oil in petro­leum ether and fil­ter­ing out the impu­ri­ties and is expressed as a per­cent­age (%) of the total.

For more quick answers to your olive oil ques­tions, ask Ollie — a bot devel­oped by the Olive Oil Times Education Lab that uses arti­fi­cial intel­li­gence to help peo­ple learn more about olive oil.