Acids and Blends
Malic Acid - is less sour than tartaric acid. Can be used to make acid adjustments in some white wines when with no ML fermenation will be performed. Also used in ciders. 3.4g per gal adjusts acidity by +.1%.
Citric Acid - Used primarily in sanitizing solutions to lower pH, therefore making the SO2 solution more effective. Use 1 tblsp per gallon along with 1 tblsp Metabisulfite per gallon. Also used in some fruit wine recipes.
Ascorbic Acid - Unbuffered pure ascorbic acid (vitamin C). Used in wine and beer to retard oxidation, or browning. A strong anti-oxidant, ascorbic acid can be used when racking to prevent oxidation, and the resulting browning. It will provide protection for a few days, after which point any unused ascorbic acid will become inactive. Often used in conjunction with metabisulfite. It will raise the acidity
Acid Blend -A 1/3 mix each of citric, tartaric and malic acids. Primarily used in fruit wines to adjust acid levels.