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Fatty Acid
Distillates of the vegetable oil deodorization are composed of free fatty acids (FFA), sterols, tocopherols, sterol esters, hydrocarbons and breakdown products of fatty acids, aldehydes, ketones and acylglycerols. The content of free fatty acids in deodorizer distillates varies between 25 and 75%.
Voluntary industry standard for FFA content in refined edible oil is ≤0.05 percent (based on oil weight). In the food industry, frying oils with FFA content exceeding 2 percent are either discarded or fresh oil is added to bring the FFA content down.