Potassium bicarbonate dry chemical fire extinguishers, as the principal component of the Purple-K dry chemical, and in some applications of condensed aerosol fire suppression. It is the only dry chemical fire suppression agent recognized by the U.S. National Fire Protection Association for firefighting at airport crash rescue sites. It is about twice as effective in fire suppression as sodium bicarbonate. Potassium bicarbonate is an effective fungicide against powdery mildew and apple scab, allowed for use in organic farming. Potassium bicarbonate has widespread use in crops, especially for neutralizing acidic soil. The word "saleratus", from Latin "sal æratus" meaning "aerated salt", was widely
Potassium bisulfate bisulfate forms potassium pyrosulfate and water: Temperatures above 600 °C further decompose potassium bisulfate to potassium sulfate and sulfur trioxide: Aqueous solutions of potassium bisulfate behave as two separate, uncombined compounds, KSO and HSO. Adding ethanol to the solution precipitates out potassium sulfate. Potassium bisulfate is commonly used to prepare potassium bitartrate for winemaking. Potassium bisulfate is also used as a disintegrating agent in analytical chemistry or as a precursor to prepare potassium persulfate, a powerful oxidizing agent. Potassium bisulfate Potassium bisulfate, is an inorganic compound with the chemical formula KHSO and is the potassium acid salt of sulfuric acid.