Acids

Malic acid is less sour than tartaric acid. Can be used to make acid adjustments in some white wines when no Malo-Lactic fermentation will be performed. Also used in ciders. 3.4g (1 tsp.) per gal adjusts acidity by +.1%.

Used to lower mash or sparge water pH. 10% concentration.

Blend of tartaric, malic and citric acids.

Reagent for acid testing kits.

Citric Acid can be used in sanitizing solutions to lower the pH, which will make the SO2 level more effective. 
In addition, it can increase acidity at a ratio of 0.1% for each teaspoon per gallon. Adding too much, however, will create a very tart flavor

Acid reducing powder. Lowers acidity levels. 3.8g per gallon will reduce acidity by roughly .1%.

The most desirable and stable of the wine acids. One teaspoon per gallon will increase acidity by 0.1%.

Used in wine and beer to retard oxidation, or browning.