Acid value



.
a number expressing the acidity of a substance, equal to the number of milligrams of potassium hydroxide needed to neutralize the free fatty acids present in one gram of the substance.
Historical Examples

Those especially important are the acid value, percentage unsaponifiable matter and titer test.
Soap-Making Manual E. G. Thomssen

The Raw Linseed Oil which was used in these tests had an acid value of 1.84%, which is very low.
Paint Technology and Tests Henry A. Gardner

noun
the number of milligrams of potassium hydroxide required to neutralize the free fatty acid in one gram of a fat, oil, resin, etc

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