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Homemade Vinegar Acidity

Do you have any information on the acidity of homemade vinegar? It is safe to use as an ingredient in home canning recipes?

Answer - Store-bought vinegar is standardized to at least 5% acetic acid or about pH 3 (read the label).

The acidity of homemade vinegar is variable because of variation in characteristics of the starting material. It could contain more or less acid.

To assure a safe product when pickling or canning with vinegar, the USDA Complete Guide to Home Canning recommends using vinegar of at least 5% acidity. Homemade vinegars should not be used in canning recipes.