The FCC (Food Chemicals Codex) method for Acidity as Acetic Acid in Ethanol is a titrimetric procedure used to quantify the free acidity in ethanol by expressing it as an equivalent amount of acetic acid. This test helps assess the purity and quality of ethanol, especially in food, pharmaceutical, and beverage applications. The inclusion of a nitrogen sparge helps eliminate dissolved CO₂ and improve endpoint clarity during titration.