Tartaric Acid (2 OZ)
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Tartaric is the major acid found in grapes.
Used for acidification in grape wine production.
It can lower the pH of a fermenting must to a level inhibitory to spoilage microbes, and act as a preservative after fermentation.
The preferred acid for adjusting acid levels in wine.
3.8g per gallon adjusts acidity by +.1%.
As a note: some tartaric acid will drop out of suspension as potassium bitartrate if you are doing any cold stabilization.
You should re-test total acidity after cold stabilization.