The acid value of a wax is determined by dissolving a known amount of the wax in alcohol and titrating the solution against standard alkali solution.

The acid value of a wax is determined by dissolving a known amount of the wax in alcohol and titrating the solution against standard alkali solution.

==USP 401==

==USP 401==

The acidity of fats and fixed oils in USP may be expressed as the number of mL of  0.1 N alkali required to neutralize the free acids in 10.0 g of substance<ref>Pharmacopedia/National Formulary. US., Vol. 1, 2009, p. 150</ref>.

The acidity of fats and fixed oils in USP may be expressed as the number of mL of  0.1 N alkali required to neutralize the free acids in 10.0 g of substance<ref>Pharmacopedia/National Formulary. US., Vol. 1, 2009, p. 150</ref>.