[5][6] As an inexpensive, nontoxic base, it is widely used in diverse application to regulate pH or as a reagent.

Potassium bicarbonate is often added to bottled water to improve taste,[7] and is also used in club soda.

Higher potassium intake may prevent development of kidney stone disease.

[11] Potassium bicarbonate is an effective fungicide against powdery mildew and apple scab, allowed for use in organic farming.

[12][13][14][15] Potassium bicarbonate is a contact killer for Spanish moss when mixed 1⁄4 cup per gallon.