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The shift from acetic acid to formic acid is not merely a chemical curiosity; it has profound implications for environmental sustainability. Formic acid is often touted as a potential green solvent and a hydrogen storage medium. Its low toxicity and biodegradability make it an attractive option in various applications, such as biofuels and renewable energy sources, especially in a world striving to minimize carbon footprints.
Also known as wine stabilizer, potassium sorbate produces sorbic acid when added to wine. It serves two purposes. When active fermentation has ceased and the wine is racked for the final time after clearing, potassium sorbate renders any surviving yeast incapable of multiplying. Yeast living at that moment can continue fermenting any residual sugar into CO2 and alcohol, but when they die, no new yeast will be present to cause future fermentation. When a wine is sweetened before bottling, potassium sorbate is used to prevent refermentation when used in conjunction with potassium metabisulfite. It is primarily used with sweet wines, sparkling wines, and some hard ciders, but may be added to table wines, which exhibit difficulty in maintaining clarity after fining.