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Acid Value

Acid Value. A measure of the amount of free fatty acids (FFA) (q.v.) that is present in a given fat (q.v.) or shortening (q.v.). It is ascertained by determining the number of milligrams (mg) (q.v.) of potassium hydroxide (q.v.) needed to neutralize the free fatty acids in one gram (g) (q.v.) of fat.